unset PROMPT_COMMAND in cmd.sh shell

[Crivella]

PROMPT_COMMAND is in general used with functions like _direnv_hook or posh-git (EG PROMPT_COMMAND="_direnv_hook;posh-git") that are unset in the environment of cmd.sh causing warning like

bash: _direnv_hook: command not found
bash: posh-git: command not found

at every command ran in a cmd.sh environment.

PROMPT_COMMAND is in general used for cosmetic / helper functions.
If there are usecases that do not rely on functions and do more than cosmetic we should also consider of it interfering with the cmd.sh environment.

Example of cmd.sh before and after unsetting PROMPT_COMMAND

crivella@crivella-desktop:~$ /tmp/eb-1bk1n87b/run-shell-cmd-output/export-fflfr7wr/cmd.sh
# Shell for the command: 'export OMPI_MCA_rmaps_base_oversubscribe=true &&  make test'
# Use command history, exit to stop
bash: _direnv_hook: command not found
bash: posh-git: command not found
eb-shell> 
bash: _direnv_hook: command not found
bash: posh-git: command not found
eb-shell> 
bash: _direnv_hook: command not found
bash: posh-git: command not found
eb-shell> unset PROMPT_COMMAND
eb-shell> 
eb-shell> 

[ocaisa]

LGTM

[ocaisa]

Going in, thanks @Crivella