fix(export): remove export causing problem

Author: joejordanbrown

src/lib/popover/index.ts

@@ -24,6 +24,6 @@ export { MdePopover } from './popover';
 export { MdePopoverTrigger } from './popover-trigger';
 export { MdePopoverTarget } from './popover-target';
 export { MdePopoverPanel, MdeTarget } from './popover-interfaces';
-export { MdePopoverPositionX, MdePopoverPositionY, MdePopoverTriggerEvent } from './popover-types';
+// export { MdePopoverPositionX, MdePopoverPositionY, MdePopoverTriggerEvent } from './popover-types';
 export { transformPopover } from './popover-animations';
 

src/lib/popover/popover-interfaces.ts

@@ -1,5 +1,5 @@
 import { ElementRef, EventEmitter, TemplateRef, ViewContainerRef } from '@angular/core';
-import {MdePopoverPositionX, MdePopoverPositionY, MdePopoverTriggerEvent} from './popover-types';
+import { MdePopoverPositionX, MdePopoverPositionY, MdePopoverTriggerEvent } from './popover-types';
 
 export interface MdePopoverPanel {
     positionX: MdePopoverPositionX;