[ios] Removed deprecated JS execution API.

ios/web/web_state/ui/web_view_js_utils.mm

Index: ios/web/web_state/ui/web_view_js_utils.mm
diff --git a/ios/web/web_state/ui/web_view_js_utils.mm b/ios/web/web_state/ui/web_view_js_utils.mm
index 78ce1d861694ff252cc6eaa73f6282b25d8e678e..77817a1f0176d12abcd8c32d0ba8760a0764672f 100644
--- a/ios/web/web_state/ui/web_view_js_utils.mm
+++ b/ios/web/web_state/ui/web_view_js_utils.mm
@@ -13,33 +13,6 @@
 #include "base/strings/sys_string_conversions.h"
 #include "base/values.h"
 
-namespace {
-
-// Converts result of WKWebView script evaluation to a string.
-NSString* StringResultFromWKResult(id result) {
-  if (!result)
-    return @"";
-
-  CFTypeID result_type = CFGetTypeID(result);
-  if (result_type == CFStringGetTypeID())
-    return result;
-
-  if (result_type == CFNumberGetTypeID())
-    return [result stringValue];
-
-  if (result_type == CFBooleanGetTypeID())
-    return [result boolValue] ? @"true" : @"false";
-
-  if (result_type == CFNullGetTypeID())
-    return @"";
-
-  // TODO(stuartmorgan): Stringify other types.
-  NOTREACHED();
-  return nil;
-}
-
-}  // namespace
-
 namespace web {
 
 NSString* const kJSEvaluationErrorDomain = @"JSEvaluationError";
@@ -79,23 +52,6 @@ std::unique_ptr<base::Value> ValueResultFromWKResult(id wk_result) {
   return result;
 }
 
-void EvaluateJavaScript(WKWebView* web_view,
-                        NSString* script,
-                        JavaScriptCompletion completion_handler) {
-  void (^web_view_completion_handler)(id, NSError*) = nil;
-  // Do not create a web_view_completion_handler if no |completion_handler| is
-  // passed to this function. WKWebView guarantees to call all completion
-  // handlers before deallocation. Passing nil as completion handler (when
-  // appropriate) may speed up web view deallocation, because there will be no
-  // need to call those completion handlers.
-  if (completion_handler) {
-    web_view_completion_handler = ^(id result, NSError* error) {
-      completion_handler(StringResultFromWKResult(result), error);
-    };
-  }
-  ExecuteJavaScript(web_view, script, web_view_completion_handler);
-}
-
 void ExecuteJavaScript(WKWebView* web_view,
                        NSString* script,
                        JavaScriptResultBlock completion_handler) {