[LyX/master] Remove two remaining snippets from the QRegExp era.

[Jean-Marc Lasgouttes]

Le 12/03/2023 à 14:49, Scott Kostyshak a écrit :
> On Sun, Mar 12, 2023 at 01:16:10PM +0100, Jean-Marc Lasgouttes wrote:
>> Le 11/03/2023 à 23:14, Jean-Marc Lasgouttes a écrit :
>>> Le 11/03/2023 à 23:01, Scott Kostyshak a écrit :
>>>> I see, so my system is not recommended but it seems this issue
>>>> should be fixed for someone with Qt 5.6.
>>>
>>> I'll do that ASAP.
>>
>> Is it better now?
> 
> Yes, compiles now. Thanks for the quick fix!

You are welcome. It is important that somebody checks that the old 
versions we claim to support are supported. What system is this?

JMarc