Issue #2080343 by connork, izus, rahul.shinde, lokapujya | mrsinguyen: Remove Unused local variables from system module.

Issue #2080559 by izus, connork, eugenesia, InternetDevels, Rajesh Ashok, mrsinguyen: Remove unused local variables from the translation module.

Issue #2080427 by connork, blainelang, harijari, areke, chertzog: Remove Unused local variables from language module.

Issue #2064639 by rahul.shinde, InternetDevels, martin107, longwave, jayeshanandani, connork, CarlHinton, vlad.n, superspring, andrei.dincu, stevepurkiss, jlindsey15, Salah Messaoud: Fixed Remove unused local variables from the node module.

Issue #2002144 by phenaproxima, connork, rdrh555, zschmid, elvis2, drupalway, heddn: Rename Views method add_field() to addField().

Issue #1431658 by Albert Volkman, kid_icarus, ChinggizKhan, xjm, rgristroph, connork: Clean up API docs for many system tests

Issue #1431658 by Albert Volkman, xjm, kid_icarus, ChinggizKhan, rgristroph, connork: Massive API docs cleanup for system tests