chore: remove Toggle Icon directive and related references

- Deleted the Toggle Icon directive implementation and its associated tests.
- Updated documentation to reflect the removal of the directive.
- Adjusted components to eliminate dependencies on the Toggle Icon directive.

docs/README.md

@@ -323,7 +323,6 @@ for more information about installing and using the source code.
 | [Node Favorite directive](content-services/directives/node-favorite.directive.md) | Selectively toggles nodes as favorites. | [Source](../lib/content-services/src/lib/directives/node-favorite.directive.ts) |
 | [Node Lock directive](content-services/directives/node-lock.directive.md) | Locks or unlocks a node. | [Source](../lib/content-services/src/lib/directives/node-lock.directive.ts) |
 | [Node Restore directive](content-services/directives/node-restore.directive.md) | Restores deleted nodes to their original location. | [Source](../lib/content-services/src/lib/directives/node-restore.directive.ts) |
-| [Toggle Icon directive](content-services/directives/toggle-icon.directive.md) | Toggle icon on mouse or keyboard event for a selectable element. | [Source](../lib/content-services/src/lib/upload/directives/toggle-icon.directive.ts) |
 | [Version Compatibility Directive](content-services/directives/version-compatibility.directive.md) | Enables/disables components based on ACS version in use. | [Source](../lib/content-services/src/lib/version-compatibility/version-compatibility.directive.ts) |
 
 ### Dialogs

docs/content-services/directives/toggle-icon.directive.md

@@ -1,27 +0,0 @@
----
-Title: Toggle Icon directive
-Added: v2.0.0
-Status: Active
-Last reviewed: 2019-04-09
----
-
-# [Toggle Icon directive](../../../lib/content-services/src/lib/upload/directives/toggle-icon.directive.ts "Defined in toggle-icon.directive.ts")
-
-Toggle icon on mouse or keyboard event for a selectable element.
-
-## Example Usage
-
-```html
-<button mat-icon-button adf-toggle-icon #toggle="toggleIcon">
-    <mat-icon *ngIf="!toggle.isToggled">
-        check_circle
-    </mat-icon>
-
-    <mat-icon *ngIf="toggle.isToggled">
-        remove_circle
-    </mat-icon>
-    <button></button>
-</button>
-```
-
-## Class members

docs/versionIndex.md

@@ -663,7 +663,6 @@ backend services have been tested with each released version of ADF.
 -   [Text mask component](core/components/text-mask.component.md)
 -   [Thumbnail service](core/services/thumbnail.service.md)
 -   [Time ago pipe](core/pipes/time-ago.pipe.md)
--   [Toggle icon directive](content-services/directives/toggle-icon.directive.md)
 -   [Toolbar divider component](core/components/toolbar-divider.component.md)
 -   [Toolbar title component](core/components/toolbar-title.component.md)
 -   [Toolbar component](core/components/toolbar.component.md)