Removed stale static variable

Author: Federico Fissore

app/src/processing/app/Base.java

@@ -99,10 +99,6 @@ public boolean apply(UserLibrary library) {
   // Location for untitled items
   static File untitledFolder;
 
-  // Current directory to use for relative paths specified on the
-  // commandline
-  static String currentDirectory = BaseNoGui.currentDirectory;
-
   // p5 icon for the window
 //  static Image icon;