Backup Codes: Always generate 10 codes via REST.

The internal function accepts a param for flexibility, but currently there's no use case for letting the user choose how many they want.

class-two-factor-core.php

@@ -512,7 +512,7 @@ public static function filter_authenticate_block_cookies( $user ) {
 
 		return $user;
 	}
-	
+
 	/**
 	 * If the current user can login via API requests such as XML-RPC and REST.
 	 *

providers/class-two-factor-backup-codes.php

@@ -77,10 +77,6 @@ public function register_rest_routes() {
 						'required' => true,
 						'type'     => 'number',
 					),
-					'number' => array(
-						'type'    => 'number',
-						'default' => self::NUMBER_OF_CODES,
-					),
 					'append' => array(
 						'type'    => 'boolean',
 						'default' => false,
@@ -270,7 +266,6 @@ public function rest_generate_codes( $request ) {
 		$user    = get_user_by( 'id', $user_id );
 
 		$args =  array(
-			'number' => $request['number'],
 			'method' => wp_validate_boolean( $request['append'] ) ? 'append' : 'replace',
 		);