Omit the regressOut step

[hatjek]

Hi all,

I suggest that we omit the regressOut step. Based on recent benchmarking (pipeComp), developments in the community, and our own comparison (Supplementary Table S2), we recommend omitting the regress-out step.

For the implementation we would need to replace
adata = bc.st.regress_out(adata, results_folder)
by
sc.pp.scale(adata, max_value=10)
in the standard workflow notebook.

Best
Klas