remove TSAN config

We don't actually do any multithreaded testing,
so the clang.tsan config isn't ever going to catch
anything another bot doesn't.

Also, it doesn't seem to work on Crostini, so I have
to keep disabling it locally, reminding me each time
how pointless the config is.

Change-Id: Ia5fd26c75c40914dbee33e475d6c252170f69055
Reviewed-on: https://skia-review.googlesource.com/144328
Commit-Queue: Mike Klein <mtklein@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
diff --git a/build.ninja b/build.ninja
index 369fa50..ddc17ea 100644
--- a/build.ninja
+++ b/build.ninja
@@ -9,7 +9,6 @@
 subninja build/clang.native
 subninja build/clang.portable
 subninja build/clang.tiny
-subninja build/clang.tsan
 subninja build/clang.xsan
 
 subninja build/gcc
diff --git a/build/clang.tsan b/build/clang.tsan
deleted file mode 100644
index 258934b..0000000
--- a/build/clang.tsan
+++ /dev/null
@@ -1,4 +0,0 @@
-mode          = .tsan
-extra_cflags  = -fsanitize=thread
-extra_ldflags = -fsanitize=thread
-include build/clang