remove .ql-embed-selected

closes #1691

Author: jhchen

assets/core.styl

@@ -173,10 +173,6 @@ resets(arr)
   .ql-align-right
     text-align: right
 
-  .ql-embed-selected
-    border: 2px solid #777
-    user-select: none
-
 .ql-editor.ql-blank::before
   color: rgba(0,0,0,0.6)
   content: attr(data-placeholder)

core/selection.js

@@ -27,7 +27,6 @@ class Selection {
     this.lastRange = this.savedRange = new Range(0, 0);
     this.handleComposition();
     this.handleDragging();
-    this.handleEmbedSelection();
     this.emitter.listenDOM('selectionchange', document, () => {
       if (!this.mouseDown) {
         setTimeout(this.update.bind(this, Emitter.sources.USER), 1);
@@ -85,23 +84,6 @@ class Selection {
     });
   }
 
-  handleEmbedSelection() {
-    this.emitter.on(Emitter.events.SELECTION_CHANGE, () => {
-      const selectedNode = document.querySelector('.ql-embed-selected');
-      if (selectedNode) {
-        selectedNode.classList.remove('ql-embed-selected');
-      }
-    });
-    this.root.addEventListener('click', (e) => {
-      const blot = Parchment.find(e.target, true);
-      if (blot instanceof Parchment.Embed) {
-        const range = new Range(blot.offset(scroll), blot.length());
-        this.setRange(range, Emitter.sources.USER);
-        blot.domNode.classList.add('ql-embed-selected');
-      }
-    });
-  }
-
   focus() {
     if (this.hasFocus()) return;
     this.root.focus();