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

See I978282c1a83620b8522399fea9008d0379dce6df for the
rationale.

This reverts commit 42f0cb7bbdd5e27b7e2bdbfdb515b72b69553a76.

Change-Id: I4cd34902b607893dc5892ec08739fec5c6105f0f
Merge "Revert "Generate a token and use it to bucket users"" into wmf/1.24wmf2