DEV: Stop logging error response body in FileHelper (#17120)

This doesn't cope well with gzipped, binary, or large responses. Ideally we would teach FinalDestination to safely retrieve and decode some of the response body. But for now, let's remove the broken implementation.

spec/lib/file_helper_spec.rb

@@ -29,7 +29,7 @@ describe FileHelper do
           expect(e.io.status[0]).to eq("404")
           raise
         end
-      end.to raise_error(OpenURI::HTTPError, "404 Error: 404")
+      end.to raise_error(OpenURI::HTTPError, "404 Error")
     end
 
     it "does not follow redirects if instructed not to" do