staging: xgifb: vb_ext: delete unused functions

Delete unused functions.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/xgifb/vb_ext.h

@@ -21,9 +21,6 @@ typedef union   _X86_REGS    {
     struct  BYTEREGS h;
 } X86_REGS, *PX86_REGS;
 
-extern   void     XGI_XG21Fun14(struct xgi_hw_device_info *pXGIHWDE, PX86_REGS pBiosArguments);
-extern void XGISetDPMS(struct xgi_hw_device_info *pXGIHWDE,
-		       unsigned long VESA_POWER_STATE);
 extern   void     XGI_GetSenseStatus(struct xgi_hw_device_info *HwDeviceExtension, struct vb_device_info *pVBInfo);
 extern   void     XGINew_SetModeScratch(struct xgi_hw_device_info *HwDeviceExtension, struct vb_device_info *pVBInfo) ;
 extern void ReadVBIOSTablData(unsigned char ChipType,