[7.x] Deprecate schema-less specs in Vega (#73805)#74789

Merged

alexwizp merged 1 commit intoelastic:7.xfrom alexwizp:backport/7.x/pr-73805

Aug 11, 2020

+40-33

Commits on Aug 11, 2020

Deprecate schema-less specs in Vega (elastic#73805 )

alexwizp
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elasticmachine
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