Revert "Work in progress"

This reverts commit ef35aa7954
because it contained too much wrong things that I won't be
using. I'll re-commit stuff from it after that that I do
want to keep.

indra/llmessage/llurlrequest.cpp

@@ -83,24 +83,6 @@ LLURLRequest::LLURLRequest(LLURLRequest::ERequestAction action, std::string cons
 {
 }
 
-bool LLURLRequest::thread_safe_impl(void) const
-{
-  if (base_state() == bs_run &&
-	  (mRunState == AICurlEasyRequestStateMachine_removed_after_finished ||
-	   mRunState == AICurlEasyRequestStateMachine_addRequest) &&
-	  mResponder->thread_safe_complete())
-  {
-	return true;
-  }
-
-  // AICurlEasyRequestStateMachine::initialize_impl is thread safe because the statemachine
-  // will only just have been created and no other thread can know of this instance.
-  if (base_state() == bs_initialize)
-	return true;
-
-  return false;
-}
-
 void LLURLRequest::initialize_impl(void)
 {
 	// If the header is "Pragma" with no value, the caller intends to