Remove redundant semicolon from namespace closing

Change-Id: I163f9d3d216c283ae1160ce4802e5247cf44fba7
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 04e8d3f..971a3b8 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -6522,4 +6522,4 @@
     config->ext.mix.usecase.source = mAudioSource;
 }
 
-}; // namespace android
+} // namespace android