hcrypto: Remove w32crypt NTDDI_VERSION checks

The library delay loads bcrypt.dll so that it can run on versions of
Windows older than Vista.  Remove the compile time checks.

Change-Id: I632b248dcca8b6e40e47011fc11d277e911ff209

lib/hcrypto/evp-w32.c

@@ -44,8 +44,6 @@
 #include <evp-w32.h>
 #include <evp-hcrypto.h>
 
-#if NTDDI_VERSION >= NTDDI_VISTA
-
 #include <evp-wincng.h>
 
 static LONG wincng_available = -1;
@@ -102,13 +100,6 @@ _hc_w32crypto_DllMain(HINSTANCE hinstDLL,
 	    return hc_EVP_hcrypto_ ##name ();		    \
     }
 
-#else
-
-#define EVP_W32CRYPTO_PROVIDER(type, name)		    \
-	EVP_W32CRYPTO_PROVIDER_CNG_UNAVAILABLE(type, name)
-
-#endif /* NTDDI_VERSION >= NTDDI_VISTA */
-
 #define EVP_W32CRYPTO_PROVIDER_CNG_UNAVAILABLE(type, name)  \
 							    \
     const type *hc_EVP_w32crypto_ ##name (void)		    \

lib/hcrypto/evp-wincng.c

@@ -35,8 +35,6 @@
 #include <windows.h>
 #include <assert.h>
 
-#if NTDDI_VERSION >= NTDDI_VISTA
-
 #include <evp.h>
 #include <evp-wincng.h>
 
@@ -706,5 +704,3 @@ void _hc_wincng_cleanup(void)
     wincng_md_algorithm_cleanup();
     wincng_cipher_algorithm_cleanup();
 }
-
-#endif /* NTDDI_VERSION >= NTDDI_VISTA */