staging: wilc1000: remove definitions unused

Remove the definitions which are not used anywhere.
- WILC_ALREADY_EXSIT
- WILC_EMPTY
- WILC_FULL
- WILC_CANCELED
- WILC_INVALID_FILE
- WILC_UNSUPPORTED_VERSION
- WILC_FILE_EOF

Remove the definition which is not used anymore.
- WILC_CATCH

Signed-off-by: Leo Kim <leo.kim@atmel.com>
Signed-off-by: Tony Cho <tony.cho@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>