init: remove 'computing context for service'... message

This line shows up immediately before starting a service for each
service without a 'seclabel' option, essentially becoming log spam.

We already log if we fail to compute the context as well.

Test: Boot bullhead

Change-Id: Ibe91fd2dd9f53a8ae2ca95ccea1636ecef2af224

init/service.cpp

@@ -634,7 +634,6 @@ bool Service::Start() {
     if (!seclabel_.empty()) {
         scon = seclabel_;
     } else {
-        LOG(INFO) << "computing context for service '" << name_ << "'";
         scon = ComputeContextFromExecutable(name_, args_[0]);
         if (scon == "") {
             return false;