Remove version checks for _MSC_VER < 1800 (msvs2013).

src/utils/SkBase64.cpp

Index: src/utils/SkBase64.cpp
diff --git a/src/utils/SkBase64.cpp b/src/utils/SkBase64.cpp
index 4c3078f25514b2045f67f48e67f11f94154893c6..b0268921ed396a03e4767a4ca1b889b854099f0b 100644
--- a/src/utils/SkBase64.cpp
+++ b/src/utils/SkBase64.cpp
@@ -29,7 +29,7 @@ static const signed char decodeData[] = {
 SkBase64::SkBase64() : fLength((size_t) -1), fData(nullptr) {
 }
 
-#if defined _WIN32 && _MSC_VER >= 1300  // disable 'two', etc. may be used without having been initialized
+#if defined _WIN32  // disable 'two', etc. may be used without having been initialized
 #pragma warning ( push )
 #pragma warning ( disable : 4701 )
 #endif
@@ -105,7 +105,7 @@ goHome:
     return kNoError;
 }
 
-#if defined _WIN32 && _MSC_VER >= 1300
+#if defined _WIN32
 #pragma warning ( pop )
 #endif