Drop --remote-user configuration option again.

* as Ingo has pointed out, the remote user settings doesn't
  relate to the build configuration at all, so setting the
  remote user via HAIKU_REMOTE_USER in UserBuildConfig or
  via shell environment is the way to go
* additionally: drop debug output

build/jam/RepositoryRules

@@ -644,7 +644,6 @@ actions UploadPackages1
 	if [ -n "$remoteUser" ]; then
 		remote="$remoteUser@$remote"
 	fi
-	echo $remote
 
 	if [ -n "$(HAIKU_REMOTE_REPOSITORY_PACKAGES:E=:J)" ]; then
 		for package in $(HAIKU_REMOTE_REPOSITORY_PACKAGES) ; do