remove unused has_viewable_synapses function

app/models/topic.rb

@@ -83,15 +83,4 @@ class Topic < ActiveRecord::Base
   def mk_permission
     Perm.short(permission)
   end
-
-  # has no viewable synapses helper function
-  def has_viewable_synapses(current)
-  	result = false
-  	synapses.each do |synapse|
-  		if synapse.authorize_to_show(current)
-  			result = true
-  		end
-  	end
-  	result
-  end
 end

spec/models/topic_spec.rb

@@ -7,46 +7,4 @@ RSpec.describe Topic, type: :model do
   it { is_expected.to have_many :mappings }
   it { is_expected.to validate_presence_of :permission }
   it { is_expected.to validate_inclusion_of(:permission).in_array Perm::ISSIONS.map(&:to_s) }
-
-  context 'has_viewable_synapses function' do
-    let (:user) { create(:user) }
-    let (:other_user) { create(:user) }
-
-    context 'topic with no synapses' do
-      let (:topic) { create(:topic) }
-
-      it 'returns false' do
-        expect(topic.has_viewable_synapses(user)).to eq false
-      end
-    end
-
-    context 'topic with one unpermitted synapse' do
-      let (:synapse) { create(:synapse, permission: :private, user: other_user) }
-      let (:topic) { create(:topic, synapses1: [synapse]) }
-
-      it 'returns false' do
-        expect(topic.has_viewable_synapses(user)).to eq false
-      end
-    end
-
-    context 'topic with one permitted synapse' do
-      let (:synapse) { create(:synapse, permission: :private, user: user) }
-      let(:topic) { create(:topic, synapses1: [synapse]) }
-
-      it 'returns true' do
-        expect(topic.has_viewable_synapses(user)).to eq true
-      end
-    end
-
-    context 'topic with one unpermitted, one permitted synapse' do
-      let (:synapse1) { create(:synapse, permission: :private, user: other_user) }
-      let (:synapse2) { create(:synapse, permission: :private, user: user) }
-      let (:topic) { create(:topic, synapses1: [synapse1, synapse2]) }
-
-      it 'returns true' do
-        expect(topic.synapses.count).to eq 2
-        expect(topic.has_viewable_synapses(user)).to eq true
-      end
-    end
-  end
 end