solves console error due to keyboard shortcut ALT+D (sugarlabs#4580)

* solves console error due to key word ALT+D

* removed entire block

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Co-authored-by: vara-prasad-07 <[email protected]>

Author: vara-prasad-07

js/activity.js

@@ -3102,9 +3102,6 @@ class Activity {
                         this.textMsg("Alt-C " + _("Copy"));
                         this.blocks.prepareStackForCopy();
                         break;
-                    case 68: // 'D'
-                        this.palettes.dict["myblocks"].promptMacrosDelete();
-                        break;
                     case 69: // 'E'
                         this.textMsg("Alt-E " + _("Erase"));
                         this._allClear(false);