media: common: btcx-risc.h: drop obsolete header

This header is no longer used, drop it.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/common/btcx-risc.h

-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- */
-struct btcx_riscmem {
-	unsigned int   size;
-	__le32         *cpu;
-	__le32         *jmp;
-	dma_addr_t     dma;
-};
-
-struct btcx_skiplist {
-	int start;
-	int end;
-};
-
-int  btcx_riscmem_alloc(struct pci_dev *pci,
-			struct btcx_riscmem *risc,
-			unsigned int size);
-void btcx_riscmem_free(struct pci_dev *pci,
-		       struct btcx_riscmem *risc);
-
-int btcx_screen_clips(int swidth, int sheight, struct v4l2_rect *win,
-		      struct v4l2_clip *clips, unsigned int n);
-int btcx_align(struct v4l2_rect *win, struct v4l2_clip *clips,
-	       unsigned int n, int mask);
-void btcx_sort_clips(struct v4l2_clip *clips, unsigned int nclips);
-void btcx_calc_skips(int line, int width, int *maxy,
-		     struct btcx_skiplist *skips, unsigned int *nskips,
-		     const struct v4l2_clip *clips, unsigned int nclips);