[Libreoffice] [PATCH] remove unused declaration - an unlikely fix for armel segfault in regcomp

[Jani Monoses]

Hello,

this declaration seems to not be used.

A similar one exists in the file token.cxx in formula/ where this was
copied from according to the comments.

This, in combination with some toolchain issue I guess caused regcomp
crashing on Ubuntu armel at the install phase.