Support `file_write' status attributes

spec/producer/core/remote/fs_spec.rb

@@ -127,7 +127,7 @@ module Producer::Core
         let(:content) { 'some_content' }
 
         it 'opens the file' do
-          expect(sftp_file).to receive(:open).with(path, 'w', anything)
+          expect(sftp_file).to receive(:open).with(path, 'w')
           fs.file_write path, content
         end
 
@@ -138,11 +138,6 @@ module Producer::Core
           end
           fs.file_write path, content
         end
-
-        it 'accepts an optional mode argument' do
-          expect(sftp_file).to receive(:open).with(anything, anything, 0600)
-          fs.file_write path, content, 0600
-        end
       end
     end
   end