Revert "Shim for VisualEditor.i18n.php that reads JSON blobs"

This reverts commit 9abad0385ded8c18466cefbc3b88722678b4ed50.

I guess for now we'll just have to keep these in sync manually until MW core is updated.

Bug: 58249
Change-Id: I243303bdcbd048248776866fa12a17fc8279b80f
Merge "Revert "Shim for VisualEditor.i18n.php that reads JSON blobs""