benchmark: drop misc/punycode benchmark

punycode has been deprecated and icu.toASCII
method does not exist. This benchmark file
has been failing for a while.

Signed-off-by: RafaelGSS <[email protected]>
PR-URL: #59171
Reviewed-By: Chemi Atlow <[email protected]>
Reviewed-By: Benjamin Gruenbaum <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: RafaelGSS