Remove Deprecated AnnotationDbi.Rnw

[jwokaty]

https://github.com/Bioconductor/AnnotationDbi/blob/devel/vignettes/AnnotationDbi.Rnw is noted as deprecated; however

From slack with @hpages

Maybe we should keep and ignore that vignette as proposed by Vince. It's true that users are no longer supposed to use the 'bimaps' interface but we don't know whether other Bioconductor packages are still using it or not. So we might want to keep the vignette around until we know for sure that all packages have migrated to the 'select' interface (this is the replacement for the 'bimaps' interface). Thx