Remove local environment running

This is a functionality that never worked perfectly and hasn't been
used for a while.

This allows developers to run the action on their local machine, but
the run was always flaky and never 100% mirrored what was happening on
the actions runner.

src/util.ts

@@ -6,7 +6,6 @@ import { Readable } from "stream";
 import * as core from "@actions/core";
 import * as semver from "semver";
 
-import { prepareLocalRunEnvironment } from "./actions-util";
 import { getApiClient, GitHubApiDetails } from "./api-client";
 import * as apiCompatibility from "./api-compatibility.json";
 import { Config } from "./config-utils";
@@ -36,16 +35,6 @@ export function getExtraOptionsEnvParam(): object {
   }
 }
 
-export function isLocalRun(): boolean {
-  return (
-    !!process.env.CODEQL_LOCAL_RUN &&
-    process.env.CODEQL_LOCAL_RUN !== "false" &&
-    process.env.CODEQL_LOCAL_RUN !== "0" &&
-    // local runs only allowed for actions
-    isActions()
-  );
-}
-
 /**
  * Get the array of all the tool names contained in the given sarif contents.
  *
@@ -444,7 +433,6 @@ export function initializeEnvironment(mode: Mode, version: string) {
     core.exportVariable(EnvVar.FEATURE_MULTI_LANGUAGE, "true");
     core.exportVariable(EnvVar.FEATURE_SANDWICH, "true");
 
-    prepareLocalRunEnvironment();
   } else {
     process.env[EnvVar.RUN_MODE] = mode;
     process.env[EnvVar.VERSION] = version;