duplicate return at the end of get_similar_courses (recommendations.py)

[SGNayak12]

Title : Remove duplicate return in get_similar_courses

Summary: recommendations.py has two consecutive return similar_courses[:limit] statements. The second one is unreachable and triggers linting errors.

Expected:Only one return statement.

Actual:Duplicate, unreachable return statement.

Impact:Lint failure and noise in code quality checks.

Proposed Fix:Remove the duplicate return at the end of the function.

[SGNayak12]

/assign

[github-actions]

Hey @SGNayak12! You're now assigned to this issue. Please finish your PR within 1 day.