Fix warning in sis frame buffer driver

diff -u linux-2.5-cleanup/drivers/video/sis/sis_main.c-o linux-2.5-cleanup/drivers/video/sis/sis_main.c
@@ -619,18 +619,9 @@
 	double drate = 0, hrate = 0;
 	int found_mode = 0;
 	int old_mode;
-	unsigned char reg;
 
 	TWDEBUG("Inside do_set_var");
 	
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)	
-	inSISIDXREG(SISCR,0x34,reg);
-	if(reg & 0x80) {
-	   printk(KERN_INFO "sisfb: Cannot change display mode, X server is active\n");
-	   return -EBUSY;
-	}
-#endif	
-
 	if((var->vmode & FB_VMODE_MASK) == FB_VMODE_NONINTERLACED) {
 		vtotal = var->upper_margin + var->yres + var->lower_margin +
 		         var->vsync_len;