v4l2_codec2: Remove unused defines from V4L2 device.

This CL performs minor cleanup and removes a few unused defines from
the V4L2 device.

Bug: 155138142
Test: arc.VideoEncodeAccel.h264_192p_i420_vm
Change-Id: I8d486775f3e1b8618f6a82dd02932892f143a17a

common/include/v4l2_codec2/common/V4L2Device.h

@@ -44,23 +44,6 @@
 #include "video_pixel_format.h"
 #include "v4l2_codec2/common/V4L2DevicePoller.h"
 
-// TODO(mojahsu): remove this once V4L2 headers are updated.
-#ifndef V4L2_PIX_FMT_JPEG_RAW
-#define V4L2_PIX_FMT_JPEG_RAW v4l2_fourcc('J', 'P', 'G', 'R')
-#endif
-#ifndef V4L2_CID_JPEG_LUMA_QUANTIZATION
-#define V4L2_CID_JPEG_LUMA_QUANTIZATION (V4L2_CID_JPEG_CLASS_BASE + 5)
-#endif
-#ifndef V4L2_CID_JPEG_CHROMA_QUANTIZATION
-#define V4L2_CID_JPEG_CHROMA_QUANTIZATION (V4L2_CID_JPEG_CLASS_BASE + 6)
-#endif
-
-// TODO(b/132589320): remove this once V4L2 header is updated.
-#ifndef V4L2_PIX_FMT_MM21
-// MTK 8-bit block mode, two non-contiguous planes.
-#define V4L2_PIX_FMT_MM21 v4l2_fourcc('M', 'M', '2', '1')
-#endif
-
 namespace media {
 
 class V4L2Queue;