Made MQTT optional.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "meshcentral",
-  "version": "0.4.1-r",
+  "version": "0.4.1-s",
   "keywords": [
     "Remote Management",
     "Intel AMT",
@@ -27,7 +27,6 @@
     "sample-config.json"
   ],
   "dependencies": {
-    "aedes": "^0.39.0",
     "archiver": "^3.0.0",
     "body-parser": "^1.19.0",
     "cbor": "4.1.5",
@@ -40,11 +39,9 @@
     "ipcheck": "^0.1.0",
     "meshcentral": "*",
     "minimist": "^1.2.0",
-    "mqtt": "^3.0.0",
     "multiparty": "^4.2.1",
     "nedb": "^1.8.0",
     "node-forge": "^0.8.4",
-    "otplib": "^11.0.1",
     "ws": "^6.2.1",
     "xmldom": "^0.1.27",
     "yauzl": "^2.10.0"