Improve OCUndeclaredVariableWarning>>declareTempAndPaste

[privat]

Low-hanging fruit. A small cleanup of declareTempAndPaste that reduces the hackish level a little

• reclassify and remove hack
• remove unused math (and a parameter)

[Ducasse]

Thanks for cleaning this prehistorical code (and it was not the original compiler but a "new one" but with left over of other hacks).

[MarcusDenker]

Yes, and the whole idea (to fix the code during exception handling) is just plain bad.

[estebanlm]

please do not submit more enhancements until we open P12 development.
right now, we are just accepting bugfixes.

[privat]

@estebanlm yes, it is intended pf P12. Unfortunately, I'm not able to set the pharo12 tag myself.