Revert "Gang rework"

src/NetscriptGang.js

@@ -1,15 +0,0 @@
-import {Player}                 from "./Player";
-import {Gang}                   from "./Gang";
-import {makeRuntimeRejectMsg}   from "./NetscriptEvaluator";
-
-export function unknownGangApiExceptionMessage(functionName, err) {
-	return `gang.${functionName}() failed with exception: ` + err;
-}
-
-export function checkGangApiAccess(workerScript, functionName) {
-	const accessDenied = `gang.${functionName}() failed because you do not currently have a Gang`;
-	const hasAccess = Player.gang instanceof Gang;
-	if (!hasAccess) {
-		throw makeRuntimeRejectMsg(workerScript, accessDenied);
-	}
-}