Remove DCHECK in TSFBridge::GetInstance.

It is really not necessary to DCHECK whether the TSFBridge instance
is null or not as the caller does check for null.

Bug: 1115355
Change-Id: I256ec204e35bb3a3b76cedb7adffee7b2e856ca7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2385978Reviewed-by: Yohei Yukawa <yukawa@chromium.org>
Commit-Queue: Anupam Snigdha <snianu@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#803211}

ui/base/ime/win/tsf_bridge.cc

@@ -707,7 +707,6 @@ TSFBridge* TSFBridge::GetInstance() {
   }
 
   TSFBridgeImpl* delegate = GetThreadLocalTSFBridge();
-  DCHECK(delegate) << "Do no call GetInstance before TSFBridge::Initialize.";
   return delegate;
 }