Documentation: Removes unused reference to @gol macro.
Removes a stale reference to the `@gol` macro in the GCC documentation build system.
The @gol macro was previously used for line breaks in gccoptlists but was removed in an earlier commit. This commit cleans up the documentation build system by removing the now-unused rule for parsing the @gol macro. This change has no user-visible effect on the generated documentation.
In Details
This commit modifies texi2pod.pl in the contrib/ directory. The @gol macro was likely a custom Texinfo macro used within the GCC documentation. The corresponding rule in texi2pod.pl is no longer needed after the macro's removal, and deleting it simplifies the build process.
For Context
GCC's documentation is written in Texinfo, a markup language. The documentation build process involves converting Texinfo source files into various formats like man pages. This commit removes an outdated rule from the script that converts Texinfo files to man pages. The removed rule was related to a macro that's no longer used in the documentation, so this change simplifies the build process without affecting the final documentation.