Remove `mavenLocal()`

Summary:
Having mavenLocal specified as part of the build is creating confusion as stale artifacts could be used inside the build.

This Diff is attempting to remove. Developers that need it for local development can still re-add it.

Changelog:
[Internal] [Changed] - Remove mavenLocal()

Reviewed By: ShikaSD

Differential Revision: D31057038

fbshipit-source-id: 90335047a0ba5a537ce347e4c1592bfe756d4135