Remove obsolete stuff from AppVeyor CI config (#189)

diff --git a/appveyor.yml b/appveyor.yml
index 954f4d1..d3ba955 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -9,16 +9,13 @@
 install:
   - ps: Install-Product node $env:nodejs_version
 
-  - npm -g install npm@5 # QUICK FIX for Node.js 4.x
-  - set PATH=%APPDATA%\npm;%PATH%
-
   - cd ..
   - git clone https://github.com/apache/cordova-android --depth 10
   - git clone https://github.com/apache/cordova-ios --depth 10
   - git clone https://github.com/apache/cordova-windows --depth 10
   - git clone https://github.com/apache/cordova-browser --depth 10
   - cd cordova-js
-  - npm install --msvs_version=2013
+  - npm install
 
 build: off