chore: remove unneeded files

.node-version

@@ -1 +0,0 @@
-v18.16.0

.npmrc

@@ -1 +0,0 @@
-use-lockfile-v6=true

.vsls.json

@@ -1,4 +0,0 @@
-{
-	"$schema": "http://json.schemastore.org/vsls",
-	"gitignore": "exclude"
-}

packages/backend/src/boot/master.ts

@@ -148,9 +148,7 @@ function showNodejsVersion(): void {
 
 	nodejsLogger.info(`Version ${process.version} detected.`);
 
-	const minVersion = fs
-		.readFileSync(`${_dirname}/../../../../.node-version`, "utf-8")
-		.trim();
+	const minVersion = "v18.16.0";
 	if (semver.lt(process.version, minVersion)) {
 		nodejsLogger.error(`At least Node.js ${minVersion} required!`);
 		process.exit(1);