Deprecated parameters

The following zppy parameters no longer perform any function:

e3sm_to_cmip_environment_commands
ts_fmt
scratch
atmosphere_only
plot_names
ncclimo_cmd (still accepted but ignored)
nrows (in global_time_series; specifying has no effect)
ncols (in global_time_series; specifying has no effect)
vars_exclude (deprecated; use vars = "" and filter in post-processing)