In "remote.c", we have a chunk of code that is #ifdef'fed out via
`#if 0` with a comment that we could export it as a helper function.
The code was implemented in 2013 and ifdef'fed in 2014, which shows that
there's clearly no interest in having such a helper at all.

As this block has recently created some confusion about `p_getenv` due
to it containing the only reference to that function in our codebase,
let's remove this block altogether.