R1:cf5abd9e4b6b

Remove unused HeraldAdapter:buildTokenizerFieldValue()

Summary:
This private function was added in https://we.phorge.it/rP715233fb611569b86f8fd4d8339a7e514c749d69.
Its last use was removed in https://we.phorge.it/rP776caa507b15ef013d3d623d30b294181e2b4c11.

Test Plan: Grep the code; run static code analysis.

Reviewers: O1 Blessed Committers, valerio.bozzolan

Reviewed By: O1 Blessed Committers, valerio.bozzolan

Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno

Differential Revision: https…