Remove redundant empty buffer decoding test
-AES 128 GCM Decrypt empty buffer
-depends_on:MBEDTLS_AES_C:MBEDTLS_GCM_C
-dec_empty_buf:MBEDTLS_CIPHER_AES_128_GCM
-
CAMELLIA GCM Decrypt empty buffer
depends_on:MBEDTLS_CAMELLIA_C:MBEDTLS_CIPHER_PADDING_PKCS7
dec_empty_buf:MBEDTLS_CIPHER_CAMELLIA_128_GCM
