Remove Nicholas Paun as maintainer

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: gcamp

.github/CODEOWNERS

@@ -1 +1 @@
-* @npaun @JMilot1 @jsteelz
+* @JMilot1 @jsteelz

setup.py

@@ -4,7 +4,7 @@
       version='0.3.0',
       description='Load GTFS',
       url='https://github.com/TransitApp/py-gtfs-loader',
-      author='Nicholas Paun, Jonathan Milot, Jeremy Steele',
+      author='Jonathan Milot, Jeremy Steele',
       license='License :: OSI Approved :: MIT License',
       packages=find_packages(),
       zip_safe=False,