fix:tslint errors

Author: ADjenkov

nativescript-angular/directives/list-view-comp.ts

@@ -1,7 +1,6 @@
 import {
     AfterContentInit,
     ChangeDetectionStrategy,
-    ChangeDetectorRef,
     Component,
     ContentChild,
     Directive,

nativescript-angular/platform-common.ts

@@ -16,7 +16,6 @@ import {
     NgModuleFactory,
     NgModuleRef,
     EventEmitter,
-    Provider,
     Sanitizer,
     InjectionToken,
     StaticProvider

nativescript-angular/platform.ts

@@ -42,10 +42,9 @@ if ((<any>global).___TS_UNUSED) {
 import "./dom-adapter";
 
 import { NativeScriptElementSchemaRegistry } from "./schema-registry";
-import { NSFileSystem } from "./file-system/ns-file-system";
 import { FileSystemResourceLoader } from "./resource-loader";
 
-export const NS_COMPILER_PROVIDERS = [
+export const NS_COMPILER_PROVIDERS: StaticProvider[] = [
     INTERNAL_BROWSER_PLATFORM_PROVIDERS,
     {
         provide: COMPILER_OPTIONS,