bpo-32282: Remove unnecessary check for `VersionHelpers.h` in `socketmodule.c` on Windows (GH-5120)

(cherry picked from commit af11a15c)

Misc/NEWS.d/next/Core and Builtins/2017-12-12-14-02-28.bpo-32282.xFVMTn.rst

+Fix an unnecessary ifdef in the include of VersionHelpers.h in socketmodule
+on Windows.

Modules/socketmodule.c

@@ -312,10 +312,8 @@ http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/net/getaddrinfo.c.diff?r1=1.82&
 #  include <fcntl.h>
 # endif
 
-#if defined(_MSC_VER) && _MSC_VER >= 1800
 /* Provides the IsWindows7SP1OrGreater() function */
 #include <VersionHelpers.h>
-#endif
 
 /* remove some flags on older version Windows during run-time.
    https://msdn.microsoft.com/en-us/library/windows/desktop/ms738596.aspx */
@@ -6571,15 +6569,7 @@ PyInit__socket(void)
 
 #ifdef MS_WINDOWS
     if (support_wsa_no_inherit == -1) {
-#if defined(_MSC_VER) && _MSC_VER >= 1800
         support_wsa_no_inherit = IsWindows7SP1OrGreater();
-#else
-        DWORD version = GetVersion();
-        DWORD major = (DWORD)LOBYTE(LOWORD(version));
-        DWORD minor = (DWORD)HIBYTE(LOWORD(version));
-        /* need Windows 7 SP1, 2008 R2 SP1 or later */
-        support_wsa_no_inherit = major > 6 || (major == 6 && minor >= 1);
-#endif
     }
 #endif