🚨 Test: race in session middleware tests

[nickajacks1]

Description

A Session must not be accessed after Save() is called, but a unit test calls Session.ID() after Session.Save(), sometimes causing the test to fail when -race is enabled. The assertions that ID() was being used in were redundant with the previous two assertions (checking that the session name header is empty), so we can just remove the offending code.

Type of change

• Unit Test

Checklist:

• I have performed a self-review of my own code
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I tried to make my code as fast as possible with as few allocations as possible