[Remote Commands] Temporarily disable secure remote commands

Since we're in the process of changing the approach slightly, roll back
and then re-enable once we update the approach.

TBR=rsorokin@chromium.org

Bug: 891222
Change-Id: Ib26cf93cb7780e795294709e3589ac06d57ae0c7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1771781
Commit-Queue: Ivan Šandrk <isandrk@chromium.org>
Reviewed-by: Ivan Šandrk <isandrk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#690432}

components/policy/core/common/cloud/cloud_policy_client.cc

@@ -623,8 +623,6 @@ void CloudPolicyClient::FetchRemoteCommands(
   for (const auto& command_result : command_results)
     *request->add_command_results() = command_result;
 
-  request->set_send_secure_commands(true);
-
   request_jobs_.push_back(service_->CreateJob(std::move(config)));
 }
 

components/policy/core/common/cloud/cloud_policy_client_unittest.cc

@@ -245,8 +245,6 @@ class CloudPolicyClientTest : public testing::Test {
         em::RemoteCommandResult_ResultType_RESULT_SUCCESS);
     command_result->set_payload(kResultPayload);
     command_result->set_timestamp(kTimestamp);
-    remote_command_request_.mutable_remote_command_request()
-        ->set_send_secure_commands(true);
 
     em::RemoteCommand* command =
         remote_command_response_.mutable_remote_command_response()