fix lint

Author: mmalerba

src/lib/select/select.spec.ts

@@ -1172,9 +1172,6 @@ describe('MdSelect', () => {
       });
 
       it('should adjust position of centered option if there is little space above', async(() => {
-        const formField = fixture.debugElement.query(By.css('.mat-form-field')).nativeElement;
-        const trigger = fixture.debugElement.query(By.css('.mat-select-trigger')).nativeElement;
-
         const selectMenuHeight = 256;
         const selectMenuViewportPadding = 8;
         const selectItemHeight = 48;
@@ -1228,9 +1225,6 @@ describe('MdSelect', () => {
       }));
 
       it('should adjust position of centered option if there is little space below', async(() => {
-        const formField = fixture.debugElement.query(By.css('.mat-form-field')).nativeElement;
-        const trigger = fixture.debugElement.query(By.css('.mat-select-trigger')).nativeElement;
-
         const selectMenuHeight = 256;
         const selectMenuViewportPadding = 8;
         const selectItemHeight = 48;

src/lib/select/select.ts

@@ -42,6 +42,9 @@ import {
   ConnectedOverlayDirective,
   Overlay,
   RepositionScrollStrategy,
+  // This import is only used to define a generic type. The current TypeScript version incorrectly
+  // considers such imports as unused (https://github.com/Microsoft/TypeScript/issues/14953)
+  // tslint:disable-next-line:no-unused-variable
   ScrollStrategy,
   ViewportRuler
 } from '@angular/cdk/overlay';