Fix MSVC warning C4702: unreachable code

[akien-mga]

Part of #66537.

Fixes all occurrences but this one:

godot/servers/physics_3d/godot_shape_3d.cpp

Lines 734 to 762 in 14e1f36

	} else {
	r_amount = 1;
	r_type = FEATURE_POINT;
	r_supports[0] = get_support(p_normal);
	return;
	Vector3 n = p_normal;
	real_t h = n.y * Math::sqrt(0.25 * height * height + radius * radius);
	if (Math::abs(h) > 1.0) {
	// Top or bottom surface.
	n.y = (n.y > 0.0) ? height * 0.5 : -height * 0.5;
	} else {
	// Lateral surface.
	n.y = height * 0.5 * h;
	}
	real_t s = Math::sqrt(n.x * n.x + n.z * n.z);
	if (Math::is_zero_approx(s)) {
	n.x = 0.0;
	n.z = 0.0;
	} else {
	real_t scaled_radius = radius / s;
	n.x = n.x * scaled_radius;
	n.z = n.z * scaled_radius;
	}
	r_supports[0] = n;
	}
	}

This is an actual bug that physics contributors need to look into.