udmabuf: Remove deleted map/unmap handlers.

Commit 7f0de8d808 ("dma-buf: Drop dma_buf_k(un)map") removed map/unmap
handlers, but they still existed in udmabuf. Remove them there as well

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Fixes: 7f0de8d808 ("dma-buf: Drop dma_buf_k(un)map")
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20191126142516.630200-1-maarten.lankhorst@linux.intel.com

drivers/dma-buf/udmabuf.c

@@ -93,26 +93,10 @@ static void release_udmabuf(struct dma_buf *buf)
 	kfree(ubuf);
 }
 
-static void *kmap_udmabuf(struct dma_buf *buf, unsigned long page_num)
-{
-	struct udmabuf *ubuf = buf->priv;
-	struct page *page = ubuf->pages[page_num];
-
-	return kmap(page);
-}
-
-static void kunmap_udmabuf(struct dma_buf *buf, unsigned long page_num,
-			   void *vaddr)
-{
-	kunmap(vaddr);
-}
-
 static const struct dma_buf_ops udmabuf_ops = {
 	.map_dma_buf	  = map_udmabuf,
 	.unmap_dma_buf	  = unmap_udmabuf,
 	.release	  = release_udmabuf,
-	.map		  = kmap_udmabuf,
-	.unmap		  = kunmap_udmabuf,
 	.mmap		  = mmap_udmabuf,
 };