fix to not assign uninitialized array to string

fixes https://skia-review.googlesource.com/c/6727/

BUG=skia:

Change-Id: I8b8f79174ec32a1fa9d17dec4f5c812f70b83fbe
Reviewed-on: https://skia-review.googlesource.com/6731
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>

tests/PathOpsThreadedCommon.h

@@ -80,8 +80,6 @@ public:
     void operator()() {
         SkBitmap bitmap;
         fState.fBitmap = &bitmap;
-        char pathStr[PATH_STR_SIZE];
-        fState.fPathStr = pathStr;
         SkGraphics::SetTLSFontCacheLimit(1 * 1024 * 1024);
         (*fTestFun)(&fState);
     }