Fix for etch build. Q and I both fixed LLDate by adding an operator!=() but...

Fix for etch build.  Q and I both fixed LLDate by adding an operator!=() but we did it different ways so the two changes didn't cause a commit collision. I'm removing mine in favor of Q's.

indra/llcommon/lldate.cpp

@@ -237,11 +237,6 @@ void LLDate::secondsSinceEpoch(F64 seconds)
 	mSecondsSinceEpoch = seconds;
 }
 
-bool operator!=(const LLDate& first, const LLDate& second)
-{
-	return (first.secondsSinceEpoch() != second.secondsSinceEpoch());
-}
-
 /* static */ LLDate LLDate::now()
 {
 	// time() returns seconds, we want fractions of a second, which LLTimer provides --RN

indra/llcommon/lldate.h

@@ -143,9 +143,6 @@ class LLDate
 	F64 mSecondsSinceEpoch;
 };
 
-// this operator required for tut
-bool operator!=(const LLDate& first, const LLDate& second);
-
 // Helper function to stream out a date
 std::ostream& operator<<(std::ostream& s, const LLDate& date);