Remove routes for removed WebProfiler actions

The import/export functionality was moved to commands in f38536ab79058f6a934426c41170256ba9623a02, but the routes were not removed.
minor #11868 Remove routes for removed WebProfiler actions (Briareos)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #11868).

Discussion
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Remove routes for removed WebProfiler actions

The import/export functionality was moved to commands in f38536ab79058f6a934426c41170256ba9623a02, but the routes were not removed.

Commits
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1421449 Remove routes for removed WebProfiler actions