Dead code: 3 validation functions in pipeline.py never called

[AshayK003]

Problem

validate_output(), validate_section(), and validate_format() in app/analyzers/pipeline.py are never called by any production code — only referenced in tests.

Solution

Remove the three functions. Keep or convert the tests to test actual pipeline behavior.

Acceptance Criteria

• No production code references these functions
• Tests still pass

Difficulty: Easy