Code clean up needed

[gaow]

$ R --slave -e "library(pecotmr)"
Registered S3 methods overwritten by 'readr':
  method                    from 
  as.data.frame.spec_tbl_df vroom
  as_tibble.spec_tbl_df     vroom
  format.col_spec           vroom
  print.col_spec            vroom
  print.collector           vroom
  print.date_names          vroom
  print.locale              vroom
  str.col_spec              vroom
Warning message:
replacing previous import 'vroom::cols' by 'readr::cols' when loading 'pecotmr'