Fix duplicated code that only appears in git.
diff --git a/src/version.c b/src/version.c
index e761c5d..8d35c64 100644
--- a/src/version.c
+++ b/src/version.c
@@ -63,12 +63,8 @@
 #ifdef BUILD_DATE
 	char *date_time = BUILD_DATE;
 #else
-#ifdef BUILD_DATE
-	char *date_time = BUILD_DATE;
-#else
 	char *date_time = __DATE__ " " __TIME__;
 #endif
-#endif
 	char *msg = _("%s (%s, compiled %s)");
 	size_t len = strlen(msg)
 		    + strlen(VIM_VERSION_LONG_ONLY)