Quash a whole bunch of warnings

llvm-svn: 145624
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: c206366fd7774aff222578c2680b931a4c2c35ba
diff --git a/src/mutex.cpp b/src/mutex.cpp
index 1681719..9aa051b 100644
--- a/src/mutex.cpp
+++ b/src/mutex.cpp
@@ -20,8 +20,7 @@
 
 mutex::~mutex()
 {
-    int e = pthread_mutex_destroy(&__m_);
-//     assert(e == 0);
+    pthread_mutex_destroy(&__m_);
 }
 
 void