Delete wall notes tests

features/project/active_tab.feature

features/project/wall.feature

features/steps/project/wall.rb

features/steps/shared/paths.rb

spec/features/security/project/internal_access_spec.rb

spec/features/security/project/private_access_spec.rb

spec/features/security/project/public_access_spec.rb

spec/mailers/notify_spec.rb

spec/requests/api/notes_spec.rb

spec/requests/api/projects_spec.rb

spec/routing/project_routing_spec.rb

spec/services/projects/create_service_spec.rb