chore: remove unneeded lines

[henryiii]

These aren't needed anymore, v2 will no longer update to v3.0.0, but only to v3, etc.

[codecov]

Codecov Report

Merging #1518 (8ef8ba5) into main (0c6ae03) will decrease coverage by 2.66%.
The diff coverage is 84.89%.

Impacted Files	Coverage Δ
...awkward/_v2/_connect/rdataframe/from_rdataframe.py	0.00% <0.00%> (ø)
...c/awkward/_v2/_connect/rdataframe/to_rdataframe.py	0.00% <0.00%> (ø)
src/awkward/_v2/types/_awkward_datashape_parser.py	47.66% <ø> (ø)
src/awkward/_v2/_connect/cling.py	25.99% <9.09%> (-0.35%)	⬇️
src/awkward/_v2/types/recordtype.py	87.06% <91.66%> (+0.83%)	⬆️
src/awkward/_v2/types/type.py	96.46% <96.10%> (-1.27%)	⬇️
src/awkward/_v2/_lookup.py	97.51% <100.00%> (+0.01%)	⬆️
src/awkward/_v2/types/__init__.py	100.00% <100.00%> (ø)
src/awkward/_v2/types/regulartype.py	90.47% <0.00%> (+4.76%)	⬆️

[jpivarski]

Okay, thanks!