Fix(Cleanup): Unused code in the EduAid/eduaid_web/src/pages/Output.jsx

[saurabh007007]

Removed the unused code in the EduAid/eduaid_web/src/pages/Output.jsx

refactor(web): remove unused pdfMode state variable

• Cleaned up Output.jsx by removing the unused pdfMode state
• Reduces component complexity and improves code maintainability

[saurabh007007]

Raised the PR #403