Remove the Node.js version healthcheck

There's no need for this to be an operational alert. This is covered
well by several Problem Hub problems and I prefer the code we don't have
to maintain.

package.json

@@ -19,8 +19,7 @@
     "express": "^4.17.3",
     "isomorphic-fetch": "^3.0.0",
     "n-health": "^13.0.0",
-    "next-metrics": "^12.15.0",
-    "semver": "^7.3.7"
+    "next-metrics": "^12.15.0"
   },
   "devDependencies": {
     "@dotcom-tool-kit/component": "^4.0.4",

src/lib/health-checks.js

@@ -8,7 +8,6 @@
 const logger = require('@dotcom-reliability-kit/logger');
 
 const metricsHealthCheck = require('./metrics-healthcheck');
-const supportedNodeJsVersionCheck = require('./supported-node-js-version-check');
 
 /**
  * @param {ExpressApp} app
@@ -32,8 +31,7 @@ module.exports = (app, options, meta) => {
 	/** @type {Healthcheck[]} */
 	const defaultChecks = [
 		...tickingMetricChecks,
-		metricsHealthCheck(meta.name),
-		supportedNodeJsVersionCheck(meta.name)
+		metricsHealthCheck(meta.name)
 	];
 
 	/** @type {Healthcheck[]} */