Don't turn on new nav user setting in specs

All the specs run with the new navigation now. So we can delete a few
duplicate specs and some `use_new_navigation: true` from user objects.

ee/spec/features/tanuki_bot_chat_spec.rb

@@ -8,7 +8,6 @@
   before do
     allow(License).to receive(:feature_available?).and_return(true)
 
-    allow(user).to receive(:use_new_navigation).and_return(true)
     sign_in(user)
   end
 

ee/spec/support/shared_examples/features/unlimited_members_during_trial_alert_shared_examples.rb

@@ -47,20 +47,4 @@
     expect(page).to have_selector('a[aria-current="page"]', text: current_page_label)
     expect(page).not_to have_selector(alert_selector)
   end
-
-  context 'when new nav is enabled' do
-    let_it_be(:user) { create(:user, use_new_navigation: true) }
-
-    it 'displays alert with Explore paid plans link and Invite more members button on other pages' do
-      visit page_path
-
-      expect(page).to have_selector(alert_selector)
-      expect(page).to have_link(text: 'Explore paid plans', href: group_billings_path(group))
-      expect(page).to have_button('Invite more members')
-
-      click_button 'Invite more members'
-
-      expect(page).to have_selector(invite_modal_selector)
-    end
-  end
 end

spec/features/commit_spec.rb

@@ -66,12 +66,4 @@ def diff_files_on_page
   end
 
   it_behaves_like "single commit view"
-
-  context "when super sidebar is enabled" do
-    before do
-      user.update!(use_new_navigation: true)
-    end
-
-    it_behaves_like "single commit view"
-  end
 end

spec/features/nav/new_nav_invite_members_spec.rb

@@ -5,7 +5,7 @@
 RSpec.describe 'new navigation toggle', :js, feature_category: :navigation do
   include Features::InviteMembersModalHelpers
 
-  let_it_be(:user) { create(:user, use_new_navigation: true) }
+  let_it_be(:user) { create(:user) }
 
   before do
     sign_in(user)

spec/features/nav/pinned_nav_items_spec.rb

@@ -3,7 +3,7 @@
 require 'spec_helper'
 
 RSpec.describe 'Navigation menu item pinning', :js, feature_category: :navigation do
-  let_it_be(:user) { create(:user, use_new_navigation: true) }
+  let_it_be(:user) { create(:user) }
 
   before do
     sign_in(user)

spec/features/projects/compare_spec.rb

@@ -185,13 +185,4 @@ def select_using_dropdown(dropdown_type, selection, commit: false)
 
   it_behaves_like "compare view of branches"
   it_behaves_like "compare view of tags"
-
-  context "when super sidebar is enabled" do
-    before do
-      user.update!(use_new_navigation: true)
-    end
-
-    it_behaves_like "compare view of branches"
-    it_behaves_like "compare view of tags"
-  end
 end