Remove variables to keep from a list of candidates for removal
.remove.sticky.vars(names, keep)A character vector containing the variables to remove.
character vector of variable names that are candidate for removal
character vector of variable names that should not be removed
If the sticky_variables option is part of the config
variable the config variable itself is added to the list of variables
to keep. Also all variables listed in config$sticky_variables in a
comma separated list are added to keep.