zephyr: Remove the unused enum for USB-A
zephyr: Remove the unused enum for USB-A

These enum-names are not used in the legacy code so remove them

BUG=b:237738771
TEST=zmake testall
BRANCH=none

Change-Id: Ib5fbdc7432e300c44a091169d0d1aeaba6f96bf6
Signed-off-by: wen zhang <8717331d0b247e00f80e6ce2b21e839bc7c51990@huaqin.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3739989
Reviewed-by: Zhengqiao Xia <2c13009d41ac04c40ca82e63df138c869ad54d59@huaqin.corp-partner.google.com>
Reviewed-by: Andrew McRae <44ad1424cfc8411c96d9181798ca41ae55709dfb@google.com>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec