diff --git a/modules/admin/controllers/maintenance/Cleanup.php b/modules/admin/controllers/maintenance/Cleanup.php
index 8a4303569..e1870720b 100644
--- a/modules/admin/controllers/maintenance/Cleanup.php
+++ b/modules/admin/controllers/maintenance/Cleanup.php
@@ -352,6 +352,11 @@ class Cleanup extends Base
 		'modules/counter/queries/updateSiteCounterUnique.xml' => 'deleted:xe',
 		'modules/counter/queries/updateSiteTotalCounterUnique.xml' => 'deleted:xe',
 		'modules/editor/components/emoticon/tpl/popup.less' => 'deleted',
+		'modules/editor/skins/ckeditor/js/default.js' => 'deleted',
+		'modules/editor/skins/ckeditor/js/default.min.js' => 'deleted',
+		'modules/editor/skins/ckeditor/js/xe_interface.js' => 'deleted',
+		'modules/editor/skins/ckeditor/js/xe_interface.min.js' => 'deleted',
+		'modules/editor/skins/ckeditor/js/xe_textarea.min.js' => 'deleted',
 		'modules/editor/skins/simpleeditor/css/simpleeditor.less' => 'deleted',
 		'modules/editor/skins/xpresseditor/' => 'deleted:xe',
 		'modules/editor/styles/' => 'deleted:xe',
diff --git a/modules/editor/skins/ckeditor/editor.html b/modules/editor/skins/ckeditor/editor.html
index 173c3f01a..20f83a18b 100644
--- a/modules/editor/skins/ckeditor/editor.html
+++ b/modules/editor/skins/ckeditor/editor.html
@@ -12,7 +12,6 @@
 <load target="../../tpl/js/editor_common.js" />
 <load target="../../tpl/js/editor.app.js" />
 <load target="js/editor.js" />
-<load target="js/xe_interface.js" />
 
 <script>
 	var auto_saved_msg = "{$lang->msg_auto_saved}";
diff --git a/modules/editor/skins/ckeditor/js/default.js b/modules/editor/skins/ckeditor/js/default.js
deleted file mode 100755
index a221fabfa..000000000
--- a/modules/editor/skins/ckeditor/js/default.js
+++ /dev/null
@@ -1,41 +0,0 @@
-//Insert uploaded file to editor
-function ckInsertUploadedFile(editorSequence){
-	var temp_code='';
-
-	var settings = uploaderSettings[editorSequence];
-	var fileListAreaID = settings["fileListAreaID"];
-	var fileListObj = get_by_id(fileListAreaID);
-	if(!fileListObj) return;
-
-	if(editorMode[editorSequence]=='preview') return;
-
-	for(var i=0;i<fileListObj.options.length;i++) {
-		if(!fileListObj.options[i].selected) continue;
-		var file_srl = fileListObj.options[i].value;
-		if(!file_srl) continue;
-
-		var file = uploadedFiles[file_srl];
-
-		if(file.direct_download == 'Y') {
-			if(/\.(jpg|jpeg|png|gif)$/i.test(file.download_url)) {
-				if(loaded_images[file_srl]) {
-					var obj = loaded_images[file_srl];
-				}
-				else {
-					var obj = new Image();
-					obj.src = file.download_url;
-				}
-				temp_code += "<img src=\""+file.download_url+"\" alt=\""+file.source_filename+"\"";
-				if(obj.complete == true) { temp_code += " width=\""+obj.width+"\" height=\""+obj.height+"\""; }
-				temp_code += " />\r\n";
-			} else {
-				temp_code="<img src=\"common/img/blank.gif\" editor_component=\"multimedia_link\" multimedia_src=\""+file.download_url+"\" width=\"400\" height=\"320\" style=\"display:block;width:400px;height:320px;border:2px dotted #4371B9;background:url(./modules/editor/components/multimedia_link/tpl/multimedia_link_component.gif) no-repeat center;\" auto_start=\"false\" alt=\"\" />";
-			}
-
-		} else {
-			temp_code="<a href=\""+file.download_url+"\">"+file.source_filename+"</a>\n";
-		}
-	}
-	cked_instance = 'ckeditor_instance_'+editorSequence;
-	CKEDITOR.instances[cked_instance].insertHtml(temp_code);
-}
diff --git a/modules/editor/skins/ckeditor/js/default.min.js b/modules/editor/skins/ckeditor/js/default.min.js
deleted file mode 100644
index 52fd46a34..000000000
--- a/modules/editor/skins/ckeditor/js/default.min.js
+++ /dev/null
@@ -1 +0,0 @@
-This file is not used in Rhymix.
diff --git a/modules/editor/skins/ckeditor/js/editor.js b/modules/editor/skins/ckeditor/js/editor.js
index 4ecfe4b1f..0d5828fc8 100644
--- a/modules/editor/skins/ckeditor/js/editor.js
+++ b/modules/editor/skins/ckeditor/js/editor.js
@@ -160,3 +160,62 @@ function ckInsertUploadedFile() {
 		}
 	}
 }
+
+/**
+ * Legacy function to get iframe content and insert it into CKEditor.
+ */
+function editorReplaceHTML(iframe_obj, content) {
+	if (typeof console == "object" && typeof console.warn == "function") {
+		const msg = "DEPRECATED : editorReplaceHTML() is deprecated in Rhymix.";
+		if (navigator.userAgent.match(/Firefox/)) {
+			console.error(msg);
+		} else {
+			console.warn(msg);
+		}
+	}
+	var editor_sequence = parseInt(iframe_obj.id.replace(/^.*_/, ''), 10);
+	_getCkeInstance(editor_sequence).insertHtml(content, 'unfiltered_html');
+}
+
+/**
+ * Legacy function to get a direct reference to the CKEditor container element.
+ */
+function editorGetIFrame(editor_sequence) {
+	if (typeof console == "object" && typeof console.warn == "function") {
+		const msg = "DEPRECATED : editorGetIFrame() is deprecated in Rhymix.";
+		if (navigator.userAgent.match(/Firefox/)) {
+			console.error(msg);
+		} else {
+			console.warn(msg);
+		}
+	}
+	return $('#ckeditor_instance_' + editor_sequence).get(0);
+}
+
+/**
+ * Legacy function to get an instance of CKEditor.
+ */
+function _getCkeInstance(editor_sequence) {
+	return $('#ckeditor_instance_' + editor_sequence).data('cke_instance');
+}
+
+/**
+ * Legacy function to get HTML content from CKEditor.
+ */
+function editorGetContent(editor_sequence) {
+	return _getCkeInstance(editor_sequence).getData();
+}
+
+/**
+ * Legacy function to get text content from CKEditor.
+ */
+function editorGetContentTextarea_xe(editor_sequence) {
+	return _getCkeInstance(editor_sequence).getText();
+}
+
+/**
+ * Legacy function to get currently selected text from CKEditor.
+ */
+function editorGetSelectedHtml(editor_sequence) {
+	return _getCkeInstance(editor_sequence).getSelection().getSelectedText();
+}
diff --git a/modules/editor/skins/ckeditor/js/xe_interface.js b/modules/editor/skins/ckeditor/js/xe_interface.js
deleted file mode 100755
index 2639e7ee4..000000000
--- a/modules/editor/skins/ckeditor/js/xe_interface.js
+++ /dev/null
@@ -1,29 +0,0 @@
-function _getCkeInstance(editor_sequence) {
-	var $editor_area = jQuery("#ckeditor_instance_"+editor_sequence);
-	return $editor_area.data('cke_instance');
-}
-
-//Get content from editor
-function editorGetContentTextarea_xe(editor_sequence) {
-	return _getCkeInstance(editor_sequence).getText();
-}
-
-
-function editorGetSelectedHtml(editor_sequence) {
-	return _getCkeInstance(editor_sequence).getSelection().getSelectedText();
-}
-
-function editorGetContent(editor_sequence) {
-	return _getCkeInstance(editor_sequence).getData();
-}
-
-//Replace html content to editor
-function editorReplaceHTML(iframe_obj, content) {
-	var editor_sequence = parseInt(iframe_obj.id.replace(/^.*_/, ''), 10);
-
-	_getCkeInstance(editor_sequence).insertHtml(content, "unfiltered_html");
-}
-
-function editorGetIFrame(editor_sequence) {
-	return jQuery('#ckeditor_instance_' + editor_sequence).get(0);
-}
diff --git a/modules/editor/skins/ckeditor/js/xe_interface.min.js b/modules/editor/skins/ckeditor/js/xe_interface.min.js
deleted file mode 100644
index 52fd46a34..000000000
--- a/modules/editor/skins/ckeditor/js/xe_interface.min.js
+++ /dev/null
@@ -1 +0,0 @@
-This file is not used in Rhymix.
diff --git a/modules/editor/skins/ckeditor/js/xe_textarea.min.js b/modules/editor/skins/ckeditor/js/xe_textarea.min.js
deleted file mode 100644
index 52fd46a34..000000000
--- a/modules/editor/skins/ckeditor/js/xe_textarea.min.js
+++ /dev/null
@@ -1 +0,0 @@
-This file is not used in Rhymix.