Revert "[server] add helper function to generate all route paths"

Summary:
This reverts commit d81b5d9324134b17f6720be943657e8dec48f48e.

Depends on D3548

Test Plan: This is just a revert. The following diffs were tested

Reviewers: varun, atul, palys-swm

Reviewed By: varun

Subscribers: Adrian, karol-bisztyga, benschac, yayabosh

Differential Revision: https://phabricator.ashoat.com/D3549