docs(mcp): streamline architecture documentation

Remove redundant performance and future enhancement sections from
MCP host configuration architecture documentation to focus on
core implementation details and current functionality.

Maintains essential architectural information while reducing
documentation maintenance overhead.

Author: LittleCoinCoin

docs/articles/devs/architecture/mcp_host_configuration.md

@@ -217,36 +217,6 @@ The system includes comprehensive testing:
 - **Environment integration tests**: Data structure compatibility
 - **Backup integration tests**: Atomic operations and rollback behavior
 
-## Performance Considerations
-
-### Strategy Registration
-
-- **One-time cost**: Registration occurs during module import
-- **Singleton instances**: Strategies are instantiated once and reused
-- **Memory efficiency**: Family inheritance reduces code duplication
-
-### Configuration Operations
-
-- **File I/O optimization**: Minimal file operations through caching
-- **JSON serialization**: Efficient handling with Pydantic v2
-- **Backup overhead**: Backup creation adds minimal overhead to operations
-
-## Future Enhancements
-
-### Planned Extensions
-
-- **Configuration validation**: Enhanced validation rules for specific host types
-- **Template system**: Predefined configuration templates for common scenarios
-- **Monitoring integration**: Health checking and status monitoring
-- **Bulk operations**: Batch configuration operations across multiple hosts
-
-### Extension Opportunities
-
-- **Custom validation plugins**: Extensible validation rule system
-- **Alternative backup strategies**: Different backup and restore mechanisms
-- **Configuration formats**: Support for additional configuration file formats
-- **Remote configuration**: Support for centralized configuration management
-
 ## Implementation Notes
 
 ### Module Organization