DOC:Remove DataFrame.append from the 10min intro (#27520)
DOC:Remove DataFrame.append from the 10min intro (#27520)

* DOC:Remove DataFrame.append from the 10min intro

Remove the `append` section from 10 min intro doc as complexity of that is very different than `list.append`

closes #27518
gfyoung/pandas,jorisvandenbossche/pandas,jorisvandenbossche/pandas,jreback/pandas,pandas-dev/pandas,dsm054/pandas,dsm054/pandas,dsm054/pandas,TomAugspurger/pandas,pandas-dev/pandas,dsm054/pandas,rs2/pandas,dsm054/pandas,datapythonista/pandas,jreback/pandas,TomAugspurger/pandas,jorisvandenbossche/pandas,datapythonista/pandas,gfyoung/pandas,rs2/pandas,gfyoung/pandas,rs2/pandas,TomAugspurger/pandas,gfyoung/pandas,TomAugspurger/pandas,rs2/pandas,datapythonista/pandas,gfyoung/pandas,jreback/pandas,pandas-dev/pandas,pandas-dev/pandas,datapythonista/pandas,jorisvandenbossche/pandas,jreback/pandas,jreback/pandas