mingw: make readlink() independent of core.symlinks

Regardless whether we think we are able to create symbolic links, we
should always read them.

This fixes https://github.com/git-for-windows/git/issues/958

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

compat/mingw.c

@@ -2600,12 +2600,6 @@ int readlink(const char *path, char *buf, size_t bufsiz)
 	char tmpbuf[MAX_LONG_PATH];
 	int len;
 
-	/* fail if symlinks are disabled */
-	if (!has_symlinks) {
-		errno = ENOSYS;
-		return -1;
-	}
-
 	if (xutftowcs_long_path(wpath, path) < 0)
 		return -1;