CP-49148: Remove unused xc.py

- Use python3 shebang for pytype_reporter.py and test_usb_scan.py
- Remove unused xc.py

Signed-off-by: Stephen Cheng <[email protected]>

Author: stephenchengCloud

python3/tests/test_usb_scan.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # unittest for usb_scan.py
 

pytype_reporter.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 """GitHub action workflow Runner for pytype which works also locally without GitHub"""
 import json
 import re