Remove some unneeded direct dependencies (#1347)

* Remove some unneeded direct dependencies

Author: bwateratmsft

package-lock.json

@@ -1972,7 +1972,6 @@
         "@types/string-replace-webpack-plugin": "^0.1.0",
         "@types/xml2js": "^0.4.5",
         "adm-zip": "^0.4.11",
-        "ajv": "^6.10.2",
         "copy-webpack-plugin": "^4.5.4",
         "gulp": "^4.0.2",
         "mocha": "^5.2.0",
@@ -1993,7 +1992,6 @@
     "dependencies": {
         "adal-node": "^0.1.28",
         "azure-arm-containerregistry": "^3.0.0",
-        "azure-arm-resource": "^2.0.0-preview",
         "azure-arm-website": "^5.3.0",
         "azure-storage": "^2.10.3",
         "deep-equal": "^1.1.0",
@@ -2006,7 +2004,6 @@
         "moment": "^2.24.0",
         "ms-rest": "^2.5.3",
         "ms-rest-azure": "^2.6.0",
-        "opn": "^6.0.0",
         "request": "^2.88.0",
         "request-promise-native": "^1.0.7",
         "semver": "^6.3.0",