Cherry-pick to 7.x: [CI] remove codecov step (#20102)#20336

Merged

v1v merged 1 commit intoelastic:7.xfrom v1v:backport/7.x/pr-20102

Jul 31, 2020

Commits on Jul 30, 2020

[CI] remove codecov step (elastic#20102 )
v1v
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