os: unexport EnableLocalUser() and DisableLocalUser()

these aren't used by module, so no need to export them.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1344>

os/access.c

@@ -260,6 +260,11 @@ static void siTypesInitialize(void);
 static void EnableLocalHost(void);
 static void DisableLocalHost(void);
 
+#ifndef NO_LOCAL_CLIENT_CRED
+static void EnableLocalUser(void);
+static void DisableLocalUser(void);
+#endif
+
 /*
  * called when authorization is not enabled to add the
  * local host to the access list
@@ -348,8 +353,7 @@ out:
     return length;
 }
 
-void
-EnableLocalUser(void)
+static void EnableLocalUser(void)
 {
     char *addr = NULL;
     int length = -1;
@@ -364,8 +368,7 @@ EnableLocalUser(void)
     free(addr);
 }
 
-void
-DisableLocalUser(void)
+static void DisableLocalUser(void)
 {
     char *addr = NULL;
     int length = -1;