refactor: remove ts2dart annotations

modules/@angular/forms/src/directives/reactive_directives/form_array_name.ts

@@ -19,11 +19,10 @@ import {AsyncValidatorFn, ValidatorFn} from '../validators';
 import {FormGroupDirective} from './form_group_directive';
 import {FormGroupName} from './form_group_name';
 
-export const formArrayNameProvider: any =
-    /*@ts2dart_const*/ /* @ts2dart_Provider */ {
-      provide: ControlContainer,
-      useExisting: forwardRef(() => FormArrayName)
-    };
+export const formArrayNameProvider: any = {
+  provide: ControlContainer,
+  useExisting: forwardRef(() => FormArrayName)
+};
 
 /**
  * Syncs an existing form array to a DOM element.

modules/@angular/forms/src/directives/reactive_directives/form_control_directive.ts

@@ -18,11 +18,10 @@ import {NgControl} from '../ng_control';
 import {composeAsyncValidators, composeValidators, isPropertyUpdated, selectValueAccessor, setUpControl} from '../shared';
 import {AsyncValidatorFn, ValidatorFn} from '../validators';
 
-export const formControlBinding: any =
-    /*@ts2dart_const*/ /* @ts2dart_Provider */ {
-      provide: NgControl,
-      useExisting: forwardRef(() => FormControlDirective)
-    };
+export const formControlBinding: any = {
+  provide: NgControl,
+  useExisting: forwardRef(() => FormControlDirective)
+};
 
 /**
  * Binds an existing {@link FormControl} to a DOM element.

modules/@angular/forms/src/directives/reactive_directives/form_control_name.ts

@@ -25,11 +25,10 @@ import {FormGroupDirective} from './form_group_directive';
 import {FormGroupName} from './form_group_name';
 
 
-export const controlNameBinding: any =
-    /*@ts2dart_const*/ /* @ts2dart_Provider */ {
-      provide: NgControl,
-      useExisting: forwardRef(() => FormControlName)
-    };
+export const controlNameBinding: any = {
+  provide: NgControl,
+  useExisting: forwardRef(() => FormControlName)
+};
 
 /**
  * Syncs an existing form control with the specified name to a DOM element.

modules/@angular/forms/src/directives/reactive_directives/form_group_directive.ts

@@ -23,11 +23,10 @@ import {composeAsyncValidators, composeValidators, setUpControl, setUpFormContai
 import {FormArrayName} from './form_array_name';
 import {FormGroupName} from './form_group_name';
 
-export const formDirectiveProvider: any =
-    /*@ts2dart_const*/ /* @ts2dart_Provider */ {
-      provide: ControlContainer,
-      useExisting: forwardRef(() => FormGroupDirective)
-    };
+export const formDirectiveProvider: any = {
+  provide: ControlContainer,
+  useExisting: forwardRef(() => FormGroupDirective)
+};
 
 /**
  * Binds an existing form group to a DOM element.

modules/@angular/forms/src/directives/reactive_directives/form_group_name.ts

@@ -16,11 +16,10 @@ import {ReactiveErrors} from '../reactive_errors';
 
 import {FormGroupDirective} from './form_group_directive';
 
-export const formGroupNameProvider: any =
-    /*@ts2dart_const*/ /* @ts2dart_Provider */ {
-      provide: ControlContainer,
-      useExisting: forwardRef(() => FormGroupName)
-    };
+export const formGroupNameProvider: any = {
+  provide: ControlContainer,
+  useExisting: forwardRef(() => FormGroupName)
+};
 
 /**
  * Syncs an existing form group to a DOM element.