xmesa: drop unused XMesaPutImageHelper.

It could only be called from XMesaCopySubBuffer but this function is not used
by XFree86.

It seems that XMesaPutImageHelper would handle sub-images but never got
finished. Proper sub-image helpers should be written if need be.

include/GL/xmesa_xf86.h

@@ -124,8 +124,7 @@ do { \
 do { \
     /* Assumes: Images are always in ZPixmap format */ \
     (void) __d; \
-    if (__sx || __sy) /* The non-trivial case */ \
-	XMesaPutImageHelper(__d,__b,__gc,__i,__sx,__sy,__x,__y,__w,__h); \
+    ASSERT(!__sx && !__sy) /* The SubImage case */ \
     ValidateGC(__b, __gc); \
     (*__gc->ops->PutImage)(__b, __gc, ((XMesaDrawable)(__b))->depth, \
 			   __x, __y, __w, __h, 0, ZPixmap, \

src/mesa/drivers/x11/xm_image.c

@@ -130,21 +130,4 @@ void XMesaPutPixel(XMesaImage *image, int x, int y, unsigned long pixel)
 }
 #endif
 
-void XMesaPutImageHelper(ScreenPtr display,
-			 DrawablePtr d, GCPtr gc,
-			 XMesaImage *image,
-			 int src_x, int src_y,
-			 int dest_x, int dest_y,
-			 unsigned int width, unsigned int height)
-{
-    /* NOT_DONE: Verify that the following works for all depths */
-    char *src = (image->data +
-		 src_y * image->bytes_per_line +
-		 ((src_x * image->bits_per_pixel) >> 3));
-
-    ValidateGC(d, gc);
-    (*gc->ops->PutImage)(d, gc, d->depth, dest_x, dest_y, width, height,
-			 0, ZPixmap, src);
-}
-
 #endif /* XFree86Server */

src/mesa/drivers/x11/xm_image.h

@@ -81,11 +81,4 @@ extern void XMesaPutPixel(XMesaImage *image, int x, int y,
 			  unsigned long pixel);
 #endif
 
-extern void XMesaPutImageHelper(ScreenPtr display,
-				DrawablePtr d, GCPtr gc,
-				XMesaImage *image,
-				int src_x, int src_y,
-				int dest_x, int dest_y,
-				unsigned int width, unsigned int height);
-
 #endif /* _XM_IMAGE_H_ */