Fix JSON syntax error in initialize_params.json

Removes extraneous EOF marker that was causing JSON parsing to fail
during C# language server initialization parameter loading.

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

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

src/solidlsp/language_servers/csharp_language_server/initialize_params.json

@@ -138,4 +138,3 @@
         }
     ]
 }
-EOF < /dev/null