Remove discord login config

src/util/entities/Config.ts

@@ -211,11 +211,6 @@ export interface ConfigValue {
 	};
 	external: {
 		twitter: string | null;
-		discord: {
-			id: string | null;
-			secret: string | null;
-			redirect: string | null;
-		};
 	};
 }
 
@@ -428,10 +423,5 @@ export const DefaultConfigOptions: ConfigValue = {
 	},
 	external: {
 		twitter: null,
-		discord: {
-			id: null,
-			secret: null,
-			redirect: null,
-		}
 	}
 };