Remove transitional explicit operator bool.

include/private/SkTemplates.h

Index: include/private/SkTemplates.h
diff --git a/include/private/SkTemplates.h b/include/private/SkTemplates.h
index e8fbfd5a893ae388ad5bb59a178ee110882025a8..272b5856ad117493be98ee42bcc3b94a5fba4b01 100644
--- a/include/private/SkTemplates.h
+++ b/include/private/SkTemplates.h
@@ -101,9 +101,6 @@ public:
     // Need to update graphics/BitmapRegionDecoder.cpp.
     T* detach() { return this->release(); }
 #endif
-
-    // See SkAutoTUnref for why we do this.
-    explicit operator bool() const { return this->get() != nullptr; }
 };
 
 template <typename T> class SkAutoTDeleteArray : public std::unique_ptr<T[]> {