gallivm: Remove MSVC RT hack.

The hack never worked reliably, and docs/llvmpipe.html is quite clear on
the requirement of matching CRT when building LLVM and Mesa already.

src/gallium/auxiliary/gallivm/lp_bld_init.c

@@ -445,17 +445,3 @@ gallivm_destroy(struct gallivm_state *gallivm)
    /* No-op: don't destroy the singleton */
    (void) gallivm;
 }
-
-
-
-/* 
- * Hack to allow the linking of release LLVM static libraries on a debug build.
- *
- * See also:
- * - http://social.msdn.microsoft.com/Forums/en-US/vclanguage/thread/7234ea2b-0042-42ed-b4e2-5d8644dfb57d
- */
-#if defined(_MSC_VER) && defined(_DEBUG)
-#include <crtdefs.h>
-_CRTIMP void __cdecl
-_invalid_parameter_noinfo(void) {}
-#endif