fix(drop-down): revert fix for bottom shadow #7821 #3977

Author: Lipata

projects/igniteui-angular/src/lib/core/styles/components/drop-down/_drop-down-component.scss

@@ -17,11 +17,6 @@
         @extend %igx-drop-down__list !optional;
     }
 
-    @include e(list, $m: empty) {
-        @extend %igx-drop-down__list !optional;
-        @extend %igx-drop-down__list--empty !optional;
-    }
-
     @include e(list-scroll) {
         @extend %igx-drop-down__list-scroll !optional;
     }

projects/igniteui-angular/src/lib/core/styles/components/drop-down/_drop-down-theme.scss

@@ -229,10 +229,6 @@
         border: --var($theme, 'border-width') solid --var($theme, 'border-color');
     }
 
-    %igx-drop-down__list--empty {
-        box-shadow: none;
-    }
-
     %igx-drop-down__list-scroll {
         overflow-y: auto;
         overflow-x: hidden;

projects/igniteui-angular/src/lib/drop-down/drop-down.component.html

@@ -1,7 +1,4 @@
-<div [ngClass]="{
-    'igx-drop-down__list': items.length > 0,
-    'igx-drop-down__list--empty': items.length === 0 }"
-[style.width]="width"
+<div class="igx-drop-down__list" [style.width]="width"
 igxToggle
 (onAppended)="onToggleContentAppended()"
 (onOpening)="onToggleOpening($event)" (onOpened)="onToggleOpened()"