JAVA-1218: Remove DBPort.finalize() method, as there is already code in place to ensure that it is closed.

Author: jyemin

src/main/com/mongodb/DBPort.java

@@ -308,12 +308,6 @@ public String toString(){
         return "{DBPort  " + host() + "}";
     }
 
-    @Override
-    protected void finalize() throws Throwable{
-        super.finalize();
-        close();
-    }
-
     ActiveState getActiveState() {
         isTrue("open", !closed);
         return _activeState;