perf: backport IdealPitch optimization from CSGO

removes ideal pitch, could not see any relevant code path being hit

this is relevant because it causes a setup bones in spatial query
from the trace during prediction, which similarly to in
the water contents optimization, would cause a lot of setup bones

Author: mastercoms

src/game/client/prediction.cpp

@@ -1793,9 +1793,12 @@ void CPrediction::_Update( bool received_new_world_update, bool validframe,
 	// This allows us to sample the world when it may not be ready to be sampled
 	Assert( C_BaseEntity::IsAbsQueriesValid() );
 
+	// UNDONE: Where is this ever used?
+#if 0
 	// FIXME: What about hierarchy here?!?
 	SetIdealPitch( localPlayer, localPlayer->GetLocalOrigin(), localPlayer->GetLocalAngles(), localPlayer->m_vecViewOffset );
 #endif
+#endif
 }