Remove version checks for _MSC_VER < 1800 (msvs2013).

src/core/SkBlitter_ARGB32.cpp

Index: src/core/SkBlitter_ARGB32.cpp
diff --git a/src/core/SkBlitter_ARGB32.cpp b/src/core/SkBlitter_ARGB32.cpp
index a00ed86d8e03a0843d1d7a851d68d4153130ab48..af62f2eb1d8c8d1d0807b04e36eabf6892ebc2d6 100644
--- a/src/core/SkBlitter_ARGB32.cpp
+++ b/src/core/SkBlitter_ARGB32.cpp
@@ -62,7 +62,7 @@ const SkPixmap* SkARGB32_Blitter::justAnOpaqueColor(uint32_t* value) {
     return nullptr;
 }
 
-#if defined _WIN32 && _MSC_VER >= 1300  // disable warning : local variable used without having been initialized
+#if defined _WIN32  // disable warning : local variable used without having been initialized
 #pragma warning ( push )
 #pragma warning ( disable : 4701 )
 #endif
@@ -252,7 +252,7 @@ void SkARGB32_Blitter::blitRect(int x, int y, int width, int height) {
     }
 }
 
-#if defined _WIN32 && _MSC_VER >= 1300
+#if defined _WIN32
 #pragma warning ( pop )
 #endif