chore: clean up tessl gitignore entries

Remove .mcp.json from git tracking (tessl-generated, already in
.gitignore). Stop ignoring tessl.json and .tessl/ so the next tessl
init can commit them properly (.tessl/.gitignore handles tiles
internally).

Author: KRRT7

.gitignore

@@ -262,9 +262,8 @@ fabric.properties
 .DS_Store
 WARP.MD
 
+# Tessl — .tessl/.gitignore handles tiles/RULES.md internally
 .mcp.json
-.tessl/
-tessl.json
 
 # Claude Code - track shared config, ignore local state
 .claude/*
@@ -279,7 +278,6 @@ tessl.json
 # Test fixture lockfiles — prevents Dependabot from scanning them
 code_to_optimize/**/package-lock.json
 
-# Tessl auto-generates AGENTS.md on install; ignore to avoid cluttering git status
 AGENTS.md
 .serena/
 .codeflash/