remove packages that do not appear to be used (#4755)

- I may have broken things - let’s see.

packages/https-proxy/package.json

@@ -24,8 +24,7 @@
     "node-forge": "0.6.49",
     "proxy-from-env": "1.0.0",
     "semaphore": "1.1.0",
-    "server-destroy-vvo": "1.0.1",
-    "ssl-root-cas": "1.3.1"
+    "server-destroy-vvo": "1.0.1"
   },
   "devDependencies": {
     "@cypress/debugging-proxy": "2.0.1",
@@ -37,6 +36,7 @@
     "sinon": "1.17.7",
     "sinon-as-promised": "4.0.3",
     "sinon-chai": "3.3.0",
+    "ssl-root-cas": "1.3.1",
     "supertest": "4.0.2"
   },
   "files": [