rollback of changelist 241965449.

*** Reason for rollback ***

Found a different way to preform the animation without needing this functionality. Rolling back to reduce the maintenance burden of the feature until we find a reason without a better work around.

*** Original change description ***

Adding isActive flag to focus trap.

Focus Trap needs a property to determine if it is active or not when dealing with elements that aren't or can't be hidden.

***

PiperOrigin-RevId: 242981425

Author: TedSander

angular_components/lib/focus/focus_trap.dart

@@ -37,10 +37,6 @@ class FocusTrapComponent implements OnDestroy {
     }
   }
 
-  /// Whether or not the focus trap is active
-  @Input()
-  bool isActive = true;
-
   @override
   void ngOnDestroy() {
     _disposer.dispose();

angular_components/lib/focus/focus_trap.html

@@ -3,8 +3,8 @@
  for details. All rights reserved. Use of this source code is governed by a
  BSD-style license that can be found in the LICENSE file.
 -->
-<div (focus)="focusLast()" [attr.tabindex]="isActive ? 0 : null"></div>
-<div focusContentWrapper [attr.tabindex]="isActive ? -1 : null" style="outline: none">
+<div (focus)="focusLast()" tabindex="0"></div>
+<div focusContentWrapper tabindex="-1" style="outline: none">
   <ng-content></ng-content>
 </div>
-<div (focus)="focusFirst()" [attr.tabindex]="isActive ? 0 : null"></div>
+<div (focus)="focusFirst()" tabindex="0"></div>