Removing this check again as it breaks postgres datasource definition

Removed this explicitly in commit d7e1991 but the check was readded...

lib/puppet/type/grafana_datasource.rb

@@ -40,13 +40,7 @@
   end
 
   newproperty(:url) do
-    desc 'The URL of the datasource'
-
-    validate do |value|
-      unless value =~ %r{^https?://}
-        raise ArgumentError, format('%s is not a valid URL', value)
-      end
-    end
+    desc 'The URL/Endpoint of the datasource'
   end
 
   newproperty(:type) do

spec/unit/puppet/type/grafana_datasource_type_spec.rb

@@ -42,12 +42,6 @@
       end.to raise_error(Puppet::Error, %r{not a valid URL})
     end
 
-    it "fails if url isn't HTTP-based" do
-      expect do
-        described_class.new name: 'foo', url: 'example.com', content: '{}', ensure: :present
-      end.to raise_error(Puppet::Error, %r{not a valid URL})
-    end
-
     it "fails if json_data isn't valid" do
       expect do
         described_class.new name: 'foo', grafana_url: 'http://example.com', json_data: 'invalid', ensure: :present