Issue #3106216 by Spokje, longwave, alexpott, apaderno, Hardik_Patel_12, daffie: Remove unused variables from core

Issue #2291055 by marthinal, tedbow, Wim Leers, kylebrowning, m1r1k, clemens.tolboom, jlbellido, vivekvpandya, snehal.brahmbhatt, dawehner, klausi, droti, alexpott, cloudbull, Berdir, heykarthikwithu, claudiu.cristea: REST resources for anonymous users: register