[ios] Removed deprecated JS execution API.

ios/web/public/web_state/js/crw_js_injection_evaluator.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef IOS_WEB_PUBLIC_WEB_STATE_JS_CRW_JS_INJECTION_EVALUATOR_H_
 #define IOS_WEB_PUBLIC_WEB_STATE_JS_CRW_JS_INJECTION_EVALUATOR_H_
 
 #import <Foundation/Foundation.h>
 
 #import "ios/web/public/block_types.h"
 
 @protocol CRWJSInjectionEvaluator
 
-// Evaluates the supplied JavaScript in the WebView. Calls |completionHandler|
-// with results of the evaluation (which may be nil if the implementing object
-// has no way to run the evaluation or the evaluation returns a nil value)
-// or an NSError if there is an error. The |completionHandler| can be nil.
-// TODO(crbug.com/595761): Change this API to return |id| instead of string.
-- (void)evaluateJavaScript:(NSString*)script
-       stringResultHandler:(web::JavaScriptCompletion)handler;
-
 // Executes the supplied JavaScript in the WebView. Calls |completionHandler|
 // with results of the execution (which may be nil if the implementing object
 // has no way to run the execution or the execution returns a nil value)
 // or an NSError if there is an error. The |completionHandler| can be nil.
 - (void)executeJavaScript:(NSString*)script
         completionHandler:(web::JavaScriptResultBlock)completionHandler;
 
 // Checks to see if the script for a class has been injected into the
 // current page already.
 - (BOOL)scriptHasBeenInjectedForClass:(Class)injectionManagerClass;
 
 // Injects the given script into the current page on behalf of
 // |injectionManagerClass|. This should only be used for injecting
 // the manager's script, and not for evaluating arbitrary JavaScript.
 - (void)injectScript:(NSString*)script forClass:(Class)injectionManagerClass;
 
 @end
 
 #endif  // IOS_WEB_PUBLIC_WEB_STATE_JS_CRW_JS_INJECTION_EVALUATOR_H_