docs: remove ngx-codemirror (#1298)

Author: jdegand

README.md

@@ -1314,7 +1314,6 @@ become an Angular expert.
 
 #### Editor Components
 
-* [@ctrl/ngx-codemirror](https://github.com/TypeCtrl/ngx-codemirror) - Codemirror Wrapper for Angular.
 * [acrodata/code-editor](https://github.com/acrodata/code-editor) - CodeMirror 6 wrapper for Angular.
 * [@instechnologies/ng-rooster](https://github.com/insurance-technologies/ng-rooster) - Angular wrapper of roosterjs, a rich text editor.
 * [angular2-froala-wysiwyg](https://github.com/froala/angular-froala-wysiwyg) - Angular 2 wrapper for Froala WYSIWYG HTML Editor.