fix(cdk/overlay): remove Optional decorator in ConnectedOverlayPositionChange constructor

Author: trik

src/cdk/overlay/position/connected-position.ts

@@ -7,7 +7,6 @@
  */
 
 /** Horizontal dimension of a connection point on the perimeter of the origin or overlay element. */
-import {Optional} from '@angular/core';
 export type HorizontalConnectionPos = 'start' | 'center' | 'end';
 
 /** Vertical dimension of a connection point on the perimeter of the origin or overlay element. */
@@ -89,10 +88,11 @@ export class ScrollingVisibility {
 /** The change event emitted by the strategy when a fallback position is used. */
 export class ConnectedOverlayPositionChange {
   constructor(
-      /** The position used as a result of this change. */
-      public connectionPair: ConnectionPositionPair,
-      /** @docs-private */
-      @Optional() public scrollableViewProperties: ScrollingVisibility) {}
+    /** The position used as a result of this change. */
+    public connectionPair: ConnectionPositionPair,
+    /** @docs-private */
+    public scrollableViewProperties: ScrollingVisibility,
+  ) {}
 }
 
 /**