fix(typings): repair broken typechecks

We had the typechecker disabled by accident, and many problems snuck in

Fixes #4507

Closes #4508

modules/angular2_material/src/components/progress-linear/progress_linear.ts

@@ -1,11 +1,4 @@
-import {
-  Component,
-  LifecycleEvent,
-  View,
-  ViewEncapsulation,
-  Attribute,
-  OnChanges
-} from 'angular2/angular2';
+import {Component, View, ViewEncapsulation, Attribute, OnChanges} from 'angular2/angular2';
 import {CONST} from 'angular2/src/core/facade/lang';
 import {isPresent, isBlank} from 'angular2/src/core/facade/lang';
 import {Math} from 'angular2/src/core/facade/math';