[BUG] Agent.py - REACT_PROMPT_TEMPLATE is never referenced

**Describe the bug**
This looks like dead code?  Perhaps before the template system?

**To Reproduce**
Steps to reproduce:
1. ...

**Expected behavior**
What you expected to happen.

**Environment:**
- OS: [e.g., Ubuntu 22.04]
- Python version: [e.g., 3.11]
- effGen version: [e.g., 0.0.2]
- GPU: [e.g., NVIDIA A40]

**Error traceback**
```
Paste full traceback here
```
