remove wasteful and mostly unused matrix math helpers (pass by reference,

don't return by value)

stepmania/src/RageMath.cpp

@@ -187,26 +187,6 @@ void RageMatrixRotationZ( RageMatrix* pOut, float theta )
 	pOut->m[1][0] = -pOut->m[0][1];
 }
 
-RageMatrix RageMatrixRotationX( float theta )
-{
-	RageMatrix m;
-	RageMatrixRotationX( &m, theta );
-	return m;
-}
-RageMatrix RageMatrixRotationY( float theta )
-{
-	RageMatrix m;
-	RageMatrixRotationY( &m, theta );
-	return m;
-}
-RageMatrix RageMatrixRotationZ( float theta )
-{
-	RageMatrix m;
-	RageMatrixRotationZ( &m, theta );
-	return m;
-}
-
-
 /* This is similar in style to Actor::Command.  However, Actors don't store
  * matrix stacks; they only store offsets and scales, and compound them into
  * a single transformations at once.  This makes some things easy, but it's not
@@ -490,13 +470,6 @@ RageMatrix RageLookAt(
 	return ret;
 }
 
-RageMatrix RageMatrixIdentity()
-{
-	RageMatrix m;
-	RageMatrixIdentity( &m );
-	return m;
-}
-
 void RageMatrixAngles( RageMatrix* pOut, const RageVector3 &angles )
 {
 	const RageVector3 angles_radians( angles * 2*PI / 360 );