ACCESS::session remove not working as expected

Just curious, but what does your iRule look like? The following example should work:

when HTTP_REQUEST {
    if { [HTTP::uri] equals "/test" } {
        ACCESS::session remove
        HTTP::redirect "http://www.example.com"
    }
}

You'd necessarily need to issue a redirect if you were removing the session based on request URI, as it'd cause an infinite loop. If you just want to disable the access policy for a particular request, you can use the ACCESS::disable command.

when HTTP_REQUEST {
    if { [HTTP::uri] equals "/test" } {
        ACCESS::disable
    }
}