Remove support for MSVC

sky/engine/wtf/dtoa/utils.h

Index: sky/engine/wtf/dtoa/utils.h
diff --git a/sky/engine/wtf/dtoa/utils.h b/sky/engine/wtf/dtoa/utils.h
index 54bbfb30fb486e2be9d61f620f67c46a866cd68d..ac7b85cc7b2420b9237bf992fd70dde742adb136 100644
--- a/sky/engine/wtf/dtoa/utils.h
+++ b/sky/engine/wtf/dtoa/utils.h
@@ -49,35 +49,13 @@ defined(__ARMEL__) || defined(__aarch64__) || \
 defined(__MIPSEL__)
 #define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
 #elif defined(_M_IX86) || defined(__i386__)
-#if defined(_WIN32)
-// Windows uses a 64bit wide floating point stack.
-#define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
-#else
 #undef DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS
-#endif  // _WIN32
 #else
 #error Target architecture was not detected as supported by Double-Conversion.
 #endif
 
-
-#if defined(_WIN32) && !defined(__MINGW32__)
-
-typedef signed char int8_t;
-typedef unsigned char uint8_t;
-typedef short int16_t;  // NOLINT
-typedef unsigned short uint16_t;  // NOLINT
-typedef int int32_t;
-typedef unsigned int uint32_t;
-typedef __int64 int64_t;
-typedef unsigned __int64 uint64_t;
-// intptr_t and friends are defined in crtdefs.h through stdio.h.
-
-#else
-
 #include <stdint.h>
 
-#endif
-
 // The following macro works on both 32 and 64-bit platforms.
 // Usage: instead of writing 0x1234567890123456
 //      write UINT64_2PART_C(0x12345678,90123456);