Revert "xkb: unexport XkbRF_Free()"

This reverts commit 34372cb3da.

Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2046>

include/xkbrules.h

@@ -76,4 +76,13 @@ typedef struct _XkbRF_Rules {
     XkbRF_GroupPtr groups;
 } XkbRF_RulesRec, *XkbRF_RulesPtr;
 
+/***====================================================================***/
+
+_XFUNCPROTOBEGIN
+
+extern _X_EXPORT void XkbRF_Free(XkbRF_RulesPtr /* rules */ ,
+                                 Bool   /* freeRules */
+    );
+
+_XFUNCPROTOEND
 #endif                          /* _XKBRULES_H_ */

xkb/xkbrules_priv.h

@@ -20,6 +20,4 @@ Bool XkbRF_LoadRules(FILE *file, XkbRF_RulesPtr rules);
 
 XkbRF_RulesPtr XkbRF_Create(void);
 
-void XkbRF_Free(XkbRF_RulesPtr rules, Bool freeRules);
-
 #endif /* _XSERVER_XKB_XKBRULES_PRIV_H */