Update for removal of docset_url attribute

Gemfile.lock

@@ -7,7 +7,7 @@ GIT
 
 GIT
   remote: https://github.com/CocoaPods/Core.git
-  revision: ca0a5d504357e48da31b274430a966d64fd62078
+  revision: 0c386062a4b72b3eb487129f6c8854bcd8ea1b68
   branch: master
   specs:
     cocoapods-core (0.39.0)

lib/cocoapods/validator.rb

@@ -257,7 +257,6 @@ module Pod
       validate_screenshots(spec)
       validate_social_media_url(spec)
       validate_documentation_url(spec)
-      validate_docset_url(spec)
 
       valid = spec.available_platforms.send(fail_fast ? :all? : :each) do |platform|
         UI.message "\n\n#{spec} - Analyzing on #{platform} platform.".green.reversed
@@ -342,12 +341,6 @@ module Pod
       validate_url(spec.documentation_url) if spec.documentation_url
     end
 
-    # Performs validations related to the `docset_url` attribute.
-    #
-    def validate_docset_url(spec)
-      validate_url(spec.docset_url) if spec.docset_url
-    end
-
     def setup_validation_environment
       validation_dir.rmtree if validation_dir.exist?
       validation_dir.mkpath

spec/unit/validator_spec.rb

@@ -265,25 +265,6 @@ module Pod
             @validator.results.map(&:to_s).first.should.match /The URL (.*) is not reachable/
           end
         end
-
-        describe 'docset URL validation' do
-          before do
-            @validator.stubs(:validate_homepage)
-          end
-
-          it 'checks if the docset URL is valid' do
-            Specification.any_instance.stubs(:docset_url).returns('http://banana-corp.local/')
-            WebMock::API.stub_request(:head, /banana-corp.local/).to_return(:status => 200)
-            @validator.validate
-            @validator.results.should.be.empty?
-          end
-
-          it "should fail validation if it wasn't able to validate the URL" do
-            Specification.any_instance.stubs(:docset_url).returns('http://banana-corp.local/not-found')
-            @validator.validate
-            @validator.results.map(&:to_s).first.should.match /The URL (.*) is not reachable/
-          end
-        end
       end
 
       it 'respects the no clean option' do