Revert "perf(gatsby-plugin-mdx): drop another babel step during sourcing"#26002

Merged

gatsbybot merged 1 commit intomasterfrom revert-25757-mdx-less-babel

Jul 24, 2020

+52-66

Commits on Jul 24, 2020

Revert "perf(gatsby-plugin-mdx): drop another babel step during sourcing (#25757 )"
LB
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