Remove this conditional branch

This branch can't get hit as this method is only called when the
claimant is a trainee teacher, ie `nqt_in_academic_year_after_itt` is
`false`.

app/models/journeys/page_sequence.rb

@@ -98,11 +98,7 @@ def lup_trainee_at_lup_school
     def handle_trainee_teacher
       case current_slug
       when "nqt-in-academic-year-after-itt"
-        if answers.nqt_in_academic_year_after_itt?
-          "supply-teacher"
-        else
-          @journey_session.answers.policy_year.in?(EligibilityCheckable::COMBINED_ECP_AND_LUP_POLICY_YEARS_BEFORE_FINAL_YEAR) ? "eligible-itt-subject" : "ineligible"
-        end
+        @journey_session.answers.policy_year.in?(EligibilityCheckable::COMBINED_ECP_AND_LUP_POLICY_YEARS_BEFORE_FINAL_YEAR) ? "eligible-itt-subject" : "ineligible"
       when "eligible-itt-subject"
         if answers.eligible_itt_subject.to_sym.in? Policies::LevellingUpPremiumPayments.fixed_subject_symbols
           "future-eligibility"