remove some dead visual studio < 2013 code

base/win/win_util.cc

Index: base/win/win_util.cc
diff --git a/base/win/win_util.cc b/base/win/win_util.cc
index f46242d3d252fc83fd4f7dd965fa6b3529335c41..a3c9ecea31488760dcd0e90cc32eda7fce560514 100644
--- a/base/win/win_util.cc
+++ b/base/win/win_util.cc
@@ -448,29 +448,3 @@ bool MaybeHasSHA256Support() {
 
 }  // namespace win
 }  // namespace base
-
-#ifdef _MSC_VER
-
-// There are optimizer bugs in x86 VS2012 pre-Update 1.
-#if _MSC_VER == 1700 && defined _M_IX86 && _MSC_FULL_VER < 170051106
-
-#pragma message("Relevant defines:")
-#define __STR2__(x) #x
-#define __STR1__(x) __STR2__(x)
-#define __PPOUT__(x) "#define " #x " " __STR1__(x)
-#if defined(_M_IX86)
-  #pragma message(__PPOUT__(_M_IX86))
-#endif
-#if defined(_M_X64)
-  #pragma message(__PPOUT__(_M_X64))
-#endif
-#if defined(_MSC_FULL_VER)
-  #pragma message(__PPOUT__(_MSC_FULL_VER))
-#endif
-
-#pragma message("Visual Studio 2012 x86 must be updated to at least Update 1")
-#error Must install Update 1 to Visual Studio 2012.
-#endif
-
-#endif  // _MSC_VER
-