remove max_abs_speed_naive

Author: benegee

src/equations/shallow_water_3d.jl

@@ -386,27 +386,6 @@ function clean_solution_lagrange_multiplier!(u, equations::ShallowWaterEquations
     u[4] -= normal_direction[3] * x_dot_div_f
 end
 
-@inline function Trixi.max_abs_speed_naive(u_ll, u_rr, normal_direction::AbstractVector,
-                                           equations::ShallowWaterEquations3D)
-    # Extract and compute the velocities in the normal direction
-    v1_ll, v2_ll, v3_ll = velocity(u_ll, equations)
-    v1_rr, v2_rr, v3_rr = velocity(u_rr, equations)
-    v_ll = v1_ll * normal_direction[1] + v2_ll * normal_direction[2] +
-           v3_ll * normal_direction[3]
-    v_rr = v1_rr * normal_direction[1] + v2_rr * normal_direction[2] +
-           v3_rr * normal_direction[3]
-
-    # Compute the wave celerity on the left and right
-    h_ll = waterheight(u_ll, equations)
-    h_rr = waterheight(u_rr, equations)
-
-    c_ll = sqrt(max(equations.gravity * h_ll, 0.0f0))
-    c_rr = sqrt(max(equations.gravity * h_rr, 0.0f0))
-
-    # The normal velocities are already scaled by the norm
-    return max(abs(v_ll), abs(v_rr)) + max(c_ll, c_rr) * norm(normal_direction)
-end
-
 @inline function Trixi.max_abs_speed(u_ll, u_rr, normal_direction::AbstractVector,
                                      equations::ShallowWaterEquations3D)
     # Extract and compute the velocities in the normal direction