Remove (untested) code for unsupported compilers.

test/cctest/test-serialize.cc

Index: test/cctest/test-serialize.cc
diff --git a/test/cctest/test-serialize.cc b/test/cctest/test-serialize.cc
index 5dd11700021c3f1d77d9eaac8a675a41bfa6baad..e73e426c4d00782b99bb414a4a0a345969312738 100644
--- a/test/cctest/test-serialize.cc
+++ b/test/cctest/test-serialize.cc
@@ -245,7 +245,7 @@ static void ReserveSpaceForSnapshot(Deserializer* deserializer,
   name.Dispose();
   int new_size, pointer_size, data_size, code_size, map_size, cell_size,
       property_cell_size, lo_size;
-#ifdef _MSC_VER
+#if V8_CC_MSVC
   // Avoid warning about unsafe fscanf from MSVC.
   // Please note that this is only fine if %c and %s are not being used.
 #define fscanf fscanf_s
@@ -258,7 +258,7 @@ static void ReserveSpaceForSnapshot(Deserializer* deserializer,
   CHECK_EQ(1, fscanf(fp, "cell %d\n", &cell_size));
   CHECK_EQ(1, fscanf(fp, "property cell %d\n", &property_cell_size));
   CHECK_EQ(1, fscanf(fp, "lo %d\n", &lo_size));
-#ifdef _MSC_VER
+#if V8_CC_MSVC
 #undef fscanf
 #endif
   fclose(fp);