fix(material/tooltip): remove old IE workaround (#29674)

Removes a workaround for an IE bug that is no longer necessary.

Author: crisbeto

src/material/tooltip/tooltip.ts

@@ -948,9 +948,6 @@ export class MatTooltip implements OnDestroy, AfterViewInit {
   encapsulation: ViewEncapsulation.None,
   changeDetection: ChangeDetectionStrategy.OnPush,
   host: {
-    // Forces the element to have a layout in IE and Edge. This fixes issues where the element
-    // won't be rendered if the animations are disabled or there is no web animations polyfill.
-    '[style.zoom]': 'isVisible() ? 1 : null',
     '(mouseleave)': '_handleMouseLeave($event)',
     'aria-hidden': 'true',
   },