Remove TSAN builder for now.

.travis.yml

@@ -65,16 +65,6 @@ matrix:
             - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
             - LIBCXX_BUILD=1 LIBCXX_SANITIZER=MemoryWithOrigins
             - EXTRA_FLAGS="-stdlib=libc++ -g -O2 -fno-omit-frame-pointer -fsanitize=memory -fsanitize-memory-track-origins"
-        # Clang w/ libc++ and MSAN
-        - compiler: clang
-          addons:
-            apt:
-              packages:
-                clang-3.8
-          env:
-            - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=RelWithDebInfo
-            - LIBCXX_BUILD=1 LIBCXX_SANITIZER=Thread
-            - EXTRA_FLAGS="-stdlib=libc++ -g -O2 -fno-omit-frame-pointer -fsanitize=thread -fno-sanitize-recover=all"
 
 before_script:
     - if [ -n "${LIBCXX_BUILD}" ]; then