disconnectChunk(chunk) {
		const cgc = this._getChunkGraphChunk(chunk);
		for (const module of cgc.modules) {
			const cgm = this._getChunkGraphModule(module);
			cgm.chunks.delete(chunk);
		}
		cgc.modules.clear();
		chunk.disconnectFromGroups();
		ChunkGraph.clearChunkGraphForChunk(chunk);
	}
@param {Chunk} chunk the chunk which will be disconnected
@returns {void}