chore: remove duplicate entries in .gitignore

.tox/ and .coverage.* were listed twice.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: mbologna

.gitignore

@@ -69,7 +69,5 @@ logs/
 .cache/
 
 # Testing
-.tox/
-.coverage.*
 coverage.xml
 *.cover