First, don’t post to five-year-old threads. That’s against forum rules. Instead, start your own post - it’s FREE!
Second, those are warnings. Your choices are:
- use the variable
- delete the variable
- ignore the warning
When you post your own thread, keep this in mind:
How to report your problem productively in the Unity3D forums:
How to understand compiler and other errors and even fix them yourself:
If you post a code snippet, ALWAYS USE CODE TAGS:
How to use code tags: Using code tags properly