Fix google vts dead lock

[Description]
Fix google vts dead lock

Bug: 271400402
Test:
1. AC on/off PASS
2. UHDTV Scan PASS
3. UHDTV Switch PASS

Change-Id: Ic198224309636c83d533a24bb15519e67931b6d1
diff --git a/tv/tuner/1.0/vts/functional/DvrTests.cpp b/tv/tuner/1.0/vts/functional/DvrTests.cpp
index 83f9858..cab5867 100644
--- a/tv/tuner/1.0/vts/functional/DvrTests.cpp
+++ b/tv/tuner/1.0/vts/functional/DvrTests.cpp
@@ -203,7 +203,6 @@
 void DvrCallback::stopRecordThread() {
     mKeepReadingRecordFMQ = false;
     mRecordThreadRunning = false;
-    android::Mutex::Autolock autoLock(mRecordThreadLock);
 }
 
 AssertionResult DvrTests::openDvrInDemux(DvrType type, uint32_t bufferSize) {