src: remove unused limits header from util-inl.h
This commit removes the inclusion of limits.h which was introduced in commit e812be4a ("src: make CLI options programatically accesible"), but as far as I can see it was not used there either so it look like it can safely be removed.
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
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