chore(repo): remove dead code and useless tests (#3375)

packages/errors/src/domains/core/CannotShrinkReservedSlotsError.ts

@@ -1,16 +0,0 @@
-// SPDX-License-Identifier: AGPL-3.0-or-later
-
-import {APIErrorCodes} from '@fluxer/constants/src/ApiErrorCodes';
-import {BadRequestError} from '@fluxer/errors/src/domains/core/BadRequestError';
-
-export class CannotShrinkReservedSlotsError extends BadRequestError {
-	constructor(reservedSlotIndices: Array<number>) {
-		super({
-			code: APIErrorCodes.CANNOT_SHRINK_RESERVED_SLOTS,
-			messageVariables: {
-				count: reservedSlotIndices.length,
-				indices: reservedSlotIndices.join(', '),
-			},
-		});
-	}
-}