:plug_session — removes Plug.Conn session mutations. A surviving mutant means no test
depends on this code writing, deleting, clearing, or reconfiguring session state.
put_session(conn, :user_id, user.id) # → conn
conn |> delete_session(:user_id) # → conn
clear_session(conn) # → conn
configure_session(conn, renew: true) # → connRemoving configure_session(conn, renew: true) on login is the classic session-fixation
bypass (the session id remains unchanged after authentication). Removing
configure_session(conn, drop: true) on logout leaves the session in place after
sign-out. A survivor here means no test pins that lifecycle behaviour.
Matches put_session/3, delete_session/2, clear_session/1, and configure_session/2
written directly (Plug.Conn.put_session(conn, ...)), aliased, or bare-imported. The
boolean option values inside configure_session/2 are still left to Mutare's built-in
boolean mutators; this family only removes the call.