[iOS] Remove renderer crash workaround

The workaround was needed for iOS 11, it can be removed now.

Fixed: 770914
Change-Id: Id55ab7f8093c3ba4b5c45fd30c12c1ffd2c15050
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1958995
Auto-Submit: Gauthier Ambard <gambard@chromium.org>
Commit-Queue: Eugene But <eugenebut@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#723402}

ios/web/web_state/ui/crw_web_controller.mm

@@ -1830,11 +1830,6 @@ typedef void (^ViewportStateCompletion)(const web::PageViewportState*);
 
 - (void)navigationHandlerWebProcessDidCrash:
     (CRWWKNavigationHandler*)navigationHandler {
-  // On iOS 11 WKWebView does not repaint after crash and reload. Recreating
-  // web view fixes the issue. TODO(crbug.com/770914): Remove this workaround
-  // once rdar://35063950 is fixed.
-  [self removeWebView];
-
   self.webStateImpl->CancelDialogs();
   self.webStateImpl->OnRenderProcessGone();
 }