Revert "xkb: delete default rules when devices are closed."

This reverts commit 7cdef0d6fc.

Nor was this one.

dix/devices.c

@@ -634,9 +634,6 @@ CloseDownDevices(void)
     inputInfo.off_devices = NULL;
     inputInfo.keyboard = NULL;
     inputInfo.pointer = NULL;
-#ifdef XKB
-    XkbDeleteRulesDflts();
-#endif
 }
 
 /**

include/xkbsrv.h

@@ -895,10 +895,6 @@ extern	void	XkbSetRulesDflts(
 	char *			/* options */
 );
 
-extern	void	XkbDeleteRulesDflts(
-	void
-);
-
 extern	void	XkbInitDevice(
 	DeviceIntPtr 	/* pXDev */
 );

xkb/xkbInit.c

@@ -278,21 +278,6 @@ XkbSetRulesDflts(char *rulesFile,char *model,char *layout,
     return;
 }
 
-void
-XkbDeleteRulesDflts()
-{
-    _XkbFree(XkbRulesFile);
-    XkbRulesFile = NULL;
-    _XkbFree(XkbModelDflt);
-    XkbModelDflt = NULL;
-    _XkbFree(XkbLayoutDflt);
-    XkbLayoutDflt = NULL;
-    _XkbFree(XkbVariantDflt);
-    XkbVariantDflt = NULL;
-    _XkbFree(XkbOptionsDflt);
-    XkbOptionsDflt = NULL;
-}
-
 /***====================================================================***/
 
 #if defined(luna)