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.h

@@ -122,9 +122,6 @@ class LLURLRequest : public AICurlEasyRequestStateMachine {
   protected:
 	// Handle initializing the object.
 	/*virtual*/ void initialize_impl(void);
-
-	// Return true if current state is thread safe.
-	/*virtual*/ bool thread_safe_impl(void) const;
 };
 
 #endif // LL_LLURLREQUEST_H