fix(guild)!: Remove API related to guild ownership (#11029)

* fix(guild): deprecate guild owner API

* style: prettier

packages/core/src/api/guild.ts

@@ -3,7 +3,6 @@
 import { makeURLSearchParams, type RawFile, type REST, type RequestData } from '@discordjs/rest';
 import {
 	Routes,
-	type GuildMFALevel,
 	type GuildWidgetStyle,
 	type RESTGetAPIAuditLogQuery,
 	type RESTGetAPIAuditLogResult,
@@ -89,7 +88,6 @@ import {
 	type RESTPostAPIGuildStickerResult,
 	type RESTPostAPIGuildTemplatesJSONBody,
 	type RESTPostAPIGuildTemplatesResult,
-	type RESTPostAPIGuildsMFAResult,
 	type RESTPutAPIGuildBanJSONBody,
 	type RESTPutAPIGuildMemberJSONBody,
 	type RESTPutAPIGuildMemberResult,
@@ -167,17 +165,6 @@ export class GuildsAPI {
 		}) as Promise<RESTPatchAPIGuildResult>;
 	}
 
-	/**
-	 * Deletes a guild
-	 *
-	 * @see {@link https://discord.com/developers/docs/resources/guild#delete-guild}
-	 * @param guildId - The id of the guild to delete
-	 * @param options - The options for deleting this guild
-	 */
-	public async delete(guildId: Snowflake, { auth, signal }: Pick<RequestData, 'auth' | 'signal'> = {}) {
-		await this.rest.delete(Routes.guild(guildId), { auth, signal });
-	}
-
 	/**
 	 * Adds user to the guild
 	 *
@@ -481,27 +468,6 @@ export class GuildsAPI {
 		await this.rest.delete(Routes.guildRole(guildId, roleId), { auth, reason, signal });
 	}
 
-	/**
-	 * Edits the multi-factor-authentication (MFA) level of a guild
-	 *
-	 * @see {@link https://discord.com/developers/docs/resources/guild#modify-guild-mfa-level}
-	 * @param guildId - The id of the guild to edit the MFA level for
-	 * @param level - The new MFA level
-	 * @param options - The options for editing the MFA level
-	 */
-	public async editMFALevel(
-		guildId: Snowflake,
-		level: GuildMFALevel,
-		{ auth, reason, signal }: Pick<RequestData, 'auth' | 'reason' | 'signal'> = {},
-	) {
-		return this.rest.post(Routes.guildMFA(guildId), {
-			auth,
-			reason,
-			signal,
-			body: { level },
-		}) as Promise<RESTPostAPIGuildsMFAResult>;
-	}
-
 	/**
 	 * Fetch the number of members that can be pruned from a guild
 	 *