mmc: core: Remove unused struct _mmc_csd from public mmc.h header

The struct _mmc_csd isn't being used and has been lurking around for a
while. Let's kill it.

Signed-off-by: Ulf Hansson <[e-mail]>
Reviewed-by: Linus Walleij <[e-mail]>
Reviewed-by: Shawn Lin <[e-mail]>

include/linux/mmc/mmc.h

···
 #define R2_SPI_OUT_OF_RANGE	(1 << 15)	/* or CSD overwrite */
 #define R2_SPI_CSD_OVERWRITE	R2_SPI_OUT_OF_RANGE
 
-/* These are unpacked versions of the actual responses */
-
-struct _mmc_csd {
-	u8  csd_structure;
-	u8  spec_vers;
-	u8  taac;
-	u8  nsac;
-	u8  tran_speed;
-	u16 ccc;
-	u8  read_bl_len;
-	u8  read_bl_partial;
-	u8  write_blk_misalign;
-	u8  read_blk_misalign;
-	u8  dsr_imp;
-	u16 c_size;
-	u8  vdd_r_curr_min;
-	u8  vdd_r_curr_max;
-	u8  vdd_w_curr_min;
-	u8  vdd_w_curr_max;
-	u8  c_size_mult;
-	union {
-		struct { /* MMC system specification version 3.1 */
-			u8  erase_grp_size;
-			u8  erase_grp_mult;
-		} v31;
-		struct { /* MMC system specification version 2.2 */
-			u8  sector_size;
-			u8  erase_grp_size;
-		} v22;
-	} erase;
-	u8  wp_grp_size;
-	u8  wp_grp_enable;
-	u8  default_ecc;
-	u8  r2w_factor;
-	u8  write_bl_len;
-	u8  write_bl_partial;
-	u8  file_format_grp;
-	u8  copy;
-	u8  perm_write_protect;
-	u8  tmp_write_protect;
-	u8  file_format;
-	u8  ecc;
-};
-
 /*
  * OCR bits are mostly in host.h
  */