Restore user edit controller, remove profile edit controller

Summary:
I took the wrong route out of the URI map in
rP0de2e03cc245723fd64f410f5fe22ee65f05f568.

The removed route was user account editing/creation.

The intended route was profile editing (now in Settings).

Test Plan:

• Clicked "Create New Account", got account create interface instead of 404.
• Went to /profile/edit/, got 404 instead of class-not-found exception.

Reviewed By: moskov
Reviewers: moskov, jungejason, tuomaspelkonen, aran
CC: aran, moskov
Differential Revision: 731