ekf2: remove size in name of state vector and matrix types

Then the state vector size can be changes without having to update the
name

src/modules/ekf2/EKF/sideslip_fusion.cpp

@@ -135,8 +135,8 @@ void Ekf::fuseSideslip(estimator_aid_source1d_s &sideslip)
 
 	_fault_status.flags.bad_sideslip = false;
 
-	Vector24f H; // Observation jacobian
-	Vector24f K; // Kalman gain vector
+	VectorState H; // Observation jacobian
+	VectorState K; // Kalman gain vector
 
 	sym::ComputeSideslipHAndK(getStateAtFusionHorizonAsVector(), P, sideslip.innovation_variance, FLT_EPSILON, &H, &K);