Remove obsolete rake task

After removing the community_id columns, migrating old data isn't
possible anymore.

lib/tasks/communities.rake

@@ -15,28 +15,4 @@ namespace :communities do
       end
     end
   end
-
-  desc "Migrate communitable data to communitable columns"
-  task migrate_communitable: :environment do
-    (Proposal.all + Budget::Investment.all).each do |communitable|
-      if communitable.community_id.present?
-        community = Community.where(id: communitable.community_id).first
-
-        if community
-          community.update(
-            communitable_id:    communitable.id,
-            communitable_type:  communitable.class.name
-          )
-        else
-          warn "WARNING: The community associated to #{communitable.class.name} "\
-               "with ID #{communitable.id} no longer exists. "\
-               "Consider running `rake communities: associate_community`"
-        end
-      else
-        warn "WARNING: #{communitable.class.name} with ID #{communitable.id} "\
-             "should have an associated community. "\
-             "Consider running `rake communities: associate_community`"
-      end
-    end
-  end
 end

spec/lib/tasks/communities_spec.rb

@@ -44,80 +44,4 @@
     end
 
   end
-
-  describe "#migrate_communitable" do
-    let :run_rake_task do
-      Rake::Task["communities:migrate_communitable"].reenable
-      Rake.application.invoke_task "communities:migrate_communitable"
-    end
-
-    context "Associate community to Proposal" do
-      let(:proposal) { create(:proposal) }
-      let(:community) { proposal.community }
-
-      context "Community has no communitable_id" do
-        before { community.update(communitable_id: nil, communitable_type: nil) }
-
-        it "assigns the communitable_id" do
-          run_rake_task
-          community.reload
-          expect(community.communitable_id).to eq proposal.id
-          expect(community.communitable_type).to eq "Proposal"
-        end
-      end
-
-      context "Proposal has no community_id" do
-        before { proposal.update_column(:community_id, nil) }
-
-        it "writes a warning with the proposal id" do
-          warning = /Proposal(.+)#{proposal.id}(.+)should have an associated/
-          expect { run_rake_task }.to output(warning).to_stderr
-        end
-      end
-
-      context "The proposal community doesn't exist anymore" do
-        before { community.destroy }
-
-        it "writes a warning with the proposal id" do
-          warning = /community(.+)Proposal(.+)#{proposal.id}(.+)no longer exists/
-          expect { run_rake_task }.to output(warning).to_stderr
-        end
-      end
-    end
-
-    context "Associate community to Budget Investment" do
-      let(:investment) { create(:budget_investment) }
-      let(:community) { investment.community }
-
-      context "Community has no communitable_id" do
-        before { community.update(communitable_id: nil, communitable_type: nil) }
-
-        it "assigns the communitable_id" do
-          run_rake_task
-          community.reload
-          expect(community.communitable_id).to eq investment.id
-          expect(community.communitable_type).to eq "Budget::Investment"
-        end
-      end
-
-      context "Investment has no community_id" do
-        before { investment.update_column(:community_id, nil) }
-
-        it "writes a warning with the investment id" do
-          warning = /Investment(.+)#{investment.id}(.+)should have an associated/
-          expect { run_rake_task }.to output(warning).to_stderr
-        end
-      end
-
-      context "The investment community doesn't exist anymore" do
-        before { community.destroy }
-
-        it "writes a warning with the investment id" do
-          warning = /community(.+)Investment(.+)#{investment.id}(.+)no longer exists/
-          expect { run_rake_task }.to output(warning).to_stderr
-        end
-      end
-    end
-
-  end
 end