Remove duplication on cellbender for preprocessing data

### Description of feature Subworkflow for QC: [quality_control/main.nf](https://github.com/nf-core/scdownstream/blob/7d5dc457039ab8e314ea5430818aa7e951cc0a55/subworkflows/local/quality_control/main.nf#L1) Sub-subworkflows: [ambient_correction/main.nf](https://github.com/nf-core/scdownstream/blob/7d5dc457039ab8e314ea5430818aa7e951cc0a55/subworkflows/local/ambient_correction/main.nf) [h5ad_removebackground_barcodes_cellbender_anndata/main.nf](https://github.com/nf-core/scdownstream/blob/7d5dc457039ab8e314ea5430818aa7e951cc0a55/subworkflows/nf-core/h5ad_removebackground_barcodes_cellbender_anndata/main.nf) The common modules between 2 subworkflows: `include { CELLBENDER_REMOVEBACKGROUND } from '../../../modules/nf-core/cellbender/removebackground'` If the user select the cellbender on the `ambient_correction` that may cause duplication on re-running cellbender using `remove-background`. I think it should be removed the method `cellbender` on ambient_correction