Remove hereby gulp shim warning (microsoft#56759)

.gulp.js

@@ -1,14 +1,8 @@
 const cp = require("child_process");
 const path = require("path");
-const chalk = require("chalk");
 
 const argv = process.argv.slice(2);
 
-// --tasks-simple is used by VS Code to infer a task list; try and keep that working.
-if (!argv.includes("--tasks-simple")) {
-    console.error(chalk.yellowBright("Warning: using gulp shim; please consider running hereby directly."));
-}
-
 const args = [
     ...process.execArgv,
     path.join(__dirname, "node_modules", "hereby", "bin", "hereby.js"),