Revert "Generate a token and use it to bucket users"

See I978282c1a83620b8522399fea9008d0379dce6df for the
rationale.

This reverts commit 2e5fa0d0359f4de22bfa8b041b08b0c42568f628.

Change-Id: I7e69a1ac1d718f2270ae3cc16df6847bfc46a8c7
Merge "Revert "Generate a token and use it to bucket users"" into wmf/1.24wmf1