removed Copy to clipboard label from compiler tab

src/app/debugger/debuggerUI/vmDebugger/DropdownPanel.js

@@ -99,7 +99,7 @@ DropdownPanel.prototype.update = function (_data, _header) {
 DropdownPanel.prototype.setContent = function (node) {
   if (!this.view) return
   var parent = this.view.querySelector('.dropdownpanel div.dropdowncontent')
-  parent.replaceChild(node, parent.firstElementChild)
+  if (parent) parent.replaceChild(node, parent.firstElementChild)
 }
 
 DropdownPanel.prototype.render = function (overridestyle) {

src/app/tabs/compile-tab.js

@@ -183,9 +183,6 @@ class CompileTab extends CompilerApi {
         <!-- Copy to Clipboard -->
         <div class="${css.contractHelperButtons} btn-secondary">
           <div class="input-group">
-            <div class="input-group-prepend">
-              <span class="input-group-text">Copy to clipboard</span>
-            </div>
             <div class="btn-group" role="group" aria-label="Copy to Clipboard">
               <button class="btn btn-secondary" title="Copy ABI to clipboard" onclick="${() => { this.copyABI() }}">
                 <i class="${css.copyIcon} fa fa-clipboard" aria-hidden="true"></i>