misc: fix openmp= deprecation

[mloubout]

No description provided.

[codecov]

Codecov Report

Merging #2186 (539544a) into master (c8e5415) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #2186   +/-   ##
=======================================
  Coverage   87.10%   87.10%           
=======================================
  Files         226      226           
  Lines       40197    40197           
  Branches     7335     7335           
=======================================
  Hits        35014    35014           
  Misses       4603     4603           
  Partials      580      580           

Files Changed	Coverage Δ
tests/test_autotuner.py	100.00% <100.00%> (ø)
tests/test_builtins.py	100.00% <100.00%> (ø)
tests/test_dimension.py	100.00% <100.00%> (ø)
tests/test_dle.py	96.47% <100.00%> (ø)
tests/test_dse.py	99.80% <100.00%> (ø)
tests/test_operator.py	97.73% <100.00%> (ø)
tests/test_pickle.py	99.63% <100.00%> (ø)

[FabioLuporini]

Thanks a lot for this cleanup. Merging.