remove unnecessary utils::data

[Artur-man]

Hello there,

Recently BiocGenerics::data has been added as a new generic:
Bioconductor/BiocGenerics@93a0f55

This PR fixes the following warning by avoid importing data from BiocGenerics:

> devtools::load_all(".")
ℹ Loading ChIPseeker
Warning message:
replacing previous import ‘BiocGenerics::data’ by ‘utils::data’ when loading ‘ ChIPseeker’ 

CC @hpages

[hpages]

Thanks @Artur-man.

Only a couple of comments:

1. The new warning is actually:

   Warning: replacing previous import ‘BiocGenerics::data’ by ‘utils::data’ when loading ‘ChIPseeker’
   

   (replace when loading ‘metaMS’ with when loading ‘ChIPseeker’)

2. This new warning can be seen on the Bioconductor daily report for BioC 3.24:

   • At package installation time (R CMD INSTALL): https://bioconductor.org/checkResults/3.24/bioc-LATEST/ChIPseeker/nebbiolo2-install.html
   • In the ouput produced by R CMD check: https://bioconductor.org/checkResults/3.24/bioc-LATEST/ChIPseeker/nebbiolo2-checksrc.html