Respond to review comments

- Pin `got` and `socket-io.client`
- Finish removing `removeSocket`-related code

package.json

@@ -34,7 +34,7 @@
     "eslint-config-scratch": "^3.1.0",
     "expose-loader": "0.7.3",
     "gh-pages": "^0.12.0",
-    "got": "^5.7.1",
+    "got": "5.7.1",
     "highlightjs": "^9.8.0",
     "htmlparser2": "3.9.2",
     "json": "^9.0.4",
@@ -46,7 +46,7 @@
     "scratch-render": "latest",
     "scratch-storage": "latest",
     "script-loader": "0.7.0",
-    "socket.io-client": "^1.7.3",
+    "socket.io-client": "1.7.3",
     "stats.js": "^0.17.0",
     "tap": "^10.2.0",
     "travis-after-all": "^1.4.4",

src/io/deviceManager.js

@@ -86,7 +86,6 @@ class DeviceOpener {
      * React to the socket becoming disconnected.
      */
     onDisconnect () {
-        this.removeSocket();
         this.clearConnectionTimeout();
         this._reject('device disconnected');
     }
@@ -102,7 +101,6 @@ class DeviceOpener {
         if (this._socket.connected) {
             this._socket.disconnect();
         } else {
-            this.removeSocket();
             this._reject('connection attempt timed out');
         }
     }