Revert "Fix go/vt/mysqlctl/mycnf_test:TestMycnf"

This reverts commit c53cca190ec7a8c02d943599b97f1d49b3e04bc5.
Revert "Fix import path in dev.env"

This reverts commit e7ba1f8710d69a62c5761f626d96dd1d032783e6.
Revert "govers github.com/youtube -> github.com/henryanand"

This reverts commit cb6b4d13f2f259b6f8352196eec14af81ffa8588.