Remove --recreate from .travis.yml

[asottile]

No description provided.

[codecov]

Codecov Report

Merging #5384 into master will increase coverage by 1.68%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5384      +/-   ##
==========================================
+ Coverage   93.47%   95.15%   +1.68%     
==========================================
  Files         114      114              
  Lines       25493    25493              
  Branches     2480     2480              
==========================================
+ Hits        23829    24259     +430     
+ Misses       1348      923     -425     
+ Partials      316      311       -5

Impacted Files	Coverage Δ
testing/python/metafunc.py	91.48% <0%> (-3.41%)	⬇️
src/_pytest/assertion/rewrite.py	92.3% <0%> (-0.54%)	⬇️
src/_pytest/main.py	95.98% <0%> (-0.24%)	⬇️
src/_pytest/config/__init__.py	93.68% <0%> (+0.16%)	⬆️
src/_pytest/fixtures.py	97.53% <0%> (+0.27%)	⬆️
src/_pytest/terminal.py	93.06% <0%> (+0.28%)	⬆️
src/_pytest/pytester.py	90.59% <0%> (+0.28%)	⬆️
testing/test_pluginmanager.py	50.21% <0%> (+1.28%)	⬆️
src/_pytest/runner.py	98% <0%> (+3.59%)	⬆️
src/_pytest/python.py	92.78% <0%> (+4.64%)	⬆️
... and 8 more

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