Remove duplicated route

[eloquence]

Status

Ready for review

Description of Changes

Removes an unintentionally duplicated route. No test implications as far as I can tell, as the method is not tested via a unit test.

Resolves #5434

Test plan

1. Build a development environment from this branch
2. Log in as an admin user
3. Attempt to change an existing user's password (not your own) using the web-based "Admin" interface. Note down the new password.

• Observe that the password change is completed successfully.
• Observe that you can log in as the user whose password you changed.

Checklist

• Linting (make lint) and tests (make test) pass in the development container

[kushaldas]

• Build a development environment from this branch
• Log in as an admin user
• Attempt to change an existing user's password (not your own) using the web-based "Admin" interface. Note down the new password.
• Observe that the password change is completed successfully.
• Observe that you can log in as the user whose password you changed.

Worked as expected. Approved.