Update defconfig.common

Author: Jason2866

configs/defconfig.common

@@ -141,7 +141,6 @@ CONFIG_MBEDTLS_CAMELLIA_C=y
 
 CONFIG_MBEDTLS_KEY_EXCHANGE_RSA=y
 CONFIG_MBEDTLS_KEY_EXCHANGE_ECJPAKE=y
-# CONFIG_MBEDTLS_PSK_MODES is not set
 # CONFIG_MBEDTLS_KEY_EXCHANGE_ELLIPTIC_CURVE is not set
 # CONFIG_MBEDTLS_KEY_EXCHANGE_ECDHE_RSA is not set
 # CONFIG_MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA is not set