remove HOMEPATH and USERPROFILE fallbacks

probably from a time when I had a mac

src/paths.js

@@ -4,7 +4,7 @@ var constants = require('./constants.js'),
     path = require('path');
 
 function baseDir() {
-    const homeDir = process.env.HOME || process.env.HOMEPATH || process.env.USERPROFILE;
+    const homeDir = process.env.HOME;
     if (constants.CLOUDRON) return homeDir;
     if (constants.TEST) return path.join(homeDir, '.cloudron_test');
     // cannot reach