add_filter( 'wcfm_membership_registration_fields_address', function( $fields ) {
    if( isset( $fields['addr_2'] ) ) $fields = wcfm_hide_field( 'addr_2', $fields );
    if( isset( $fields['state'] ) ) $fields = wcfm_hide_field( 'state', $fields );
    return $fields;
} );