pp_ctl.c: Remove code which is no longer reachable

[jkeenan]

This block was effectively superseded in abf573d in Nov/Dec 2022.

Fixes: GH #23958.

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• This set of changes does not require a perldelta entry.

[richardleach]

abf573d notes that it: adds compile-time detection for many cases that can be statically determined.

Does this mean that there are cases that cannot be statically determined and would still need this runtime code? (Perhaps a question for @leonerd ?)

[jkeenan]

abf573d notes that it: adds compile-time detection for many cases that can be statically determined.

Does this mean that there are cases that cannot be statically determined and would still need this runtime code? (Perhaps a question for @leonerd ?)

I'm hoping that @leonerd spots #23958 and explores this question.