spi-generic: remove SPI_FLASH_SECTOR_ERASE_TIMEOUT_MS

There was one user of SPI_FLASH_SECTOR_ERASE_TIMEOUT_MS,
southbridge/intel/common/spi.c. Remove the define and encode
the 1 second timeout that it was wanting at the single use site.

Change-Id: If33a1a04bc4d3441e90bf0ca305ddf71c4f8bb88
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37962
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

src/include/spi-generic.h

@@ -22,7 +22,6 @@
  */
 #define SPI_FLASH_PROG_TIMEOUT_MS		200
 #define SPI_FLASH_PAGE_ERASE_TIMEOUT_MS		500
-#define SPI_FLASH_SECTOR_ERASE_TIMEOUT_MS	1000
 
 #include <commonlib/region.h>
 #include <stdint.h>