Revert "Annotate benign race on SkPath::fConvexity."

This reverts commit c51a3a4e3c81a1d4100d5d29d31bf3a02eda2a7c.

Reason for revert: had to revert this in the copy constructor.  Might as well revert here too for consistency.

Original change's description:
> Annotate benign race on SkPath::fConvexity.
> 
> We're tired of this making our TSAN bot flaky, and equally tired of trying to fix it.
> 
> BUG=skia:5776
> 
> CQ_INCLUDE_TRYBOTS=master.client.skia:Test-Ubuntu-Clang-GCE-CPU-AVX2-x86_64-Release-TSAN-Trybot
> 
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4691
> 
> Change-Id: Ib6005282c514a6d785fd4fffe5387cbb1caccbe1
> Reviewed-on: https://skia-review.googlesource.com/4691
> Commit-Queue: Mike Klein <mtklein@chromium.org>
> Reviewed-by: Ben Wagner <bungeman@google.com>
> 

TBR=mtklein@chromium.org,bungeman@google.com,reed@google.com,reviews@skia.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: I906b1e017471d9e00fc58402136497459d881f72
Reviewed-on: https://skia-review.googlesource.com/4740
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Mike Klein <mtklein@chromium.org>
diff --git a/src/core/SkPath.cpp b/src/core/SkPath.cpp
index 6e201bd..8241c10 100644
--- a/src/core/SkPath.cpp
+++ b/src/core/SkPath.cpp
@@ -13,7 +13,6 @@
 #include "SkPathPriv.h"
 #include "SkPathRef.h"
 #include "SkRRect.h"
-#include "SkTSAN.h"
 
 ////////////////////////////////////////////////////////////////////////////
 
@@ -129,8 +128,6 @@
     : fPathRef(SkPathRef::CreateEmpty()) {
     this->resetFields();
     fIsVolatile = false;
-    AnnotateBenignRaceSized(__FILE__, __LINE__, &fConvexity, sizeof(fConvexity),
-                            "We've tried a few times to make this thread safe, and failed.");
 }
 
 void SkPath::resetFields() {
diff --git a/src/core/SkTSAN.h b/src/core/SkTSAN.h
deleted file mode 100644
index 8e00b9f..0000000
--- a/src/core/SkTSAN.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef SkTSAN_DEFINED
-#define SkTSAN_DEFINED
-
-#if !defined(__has_feature)
-    #define __has_feature(x) 0
-#endif
-
-#if __has_feature(thread_sanitizer)
-    extern "C" void AnnotateBenignRaceSized(const char* file, int line,
-                                            const volatile void* ptr, long size,
-                                            const char* desc);
-#else
-    static inline void AnnotateBenignRaceSized(const char* file, int line,
-                                               const volatile void* ptr, long size,
-                                               const char* desc) {}
-#endif
-
-
-#endif//SkTSAN_DEFINED