Revert "verify_path(): do not allow absolute paths"

This reverts commit 8e78bd5710.

We do support absolute paths on Windows now.

read-cache.c

@@ -634,11 +634,6 @@ int verify_path(const char *path)
 {
 	char c;
 
-#ifdef __MINGW32__
-	if (is_absolute_path(path))
-		return error("Cannot handle absolute path: %s", path);
-#endif
-
 	goto inside;
 	for (;;) {
 		if (!c)