Remove FOV adjustment with Alt + mouse wheel in the 3D editor

This shortcut got in the way when using the Maya navigation scheme,
and also when using the slow freelook modifier (regardless of
navigation scheme).

(cherry picked from commit 53f4ff243d60157101d082f96aef4977f4002c65)

editor/plugins/spatial_editor_plugin.cpp

@@ -1171,26 +1171,18 @@ void SpatialEditorViewport::_sinput(const Ref<InputEvent> &p_event) {
 		float zoom_factor = 1 + (ZOOM_FREELOOK_MULTIPLIER - 1) * b->get_factor();
 		switch (b->get_button_index()) {
 			case BUTTON_WHEEL_UP: {
-				if (b->get_alt()) {
-					scale_fov(-0.05);
+				if (is_freelook_active()) {
+					scale_freelook_speed(zoom_factor);
 				} else {
-					if (is_freelook_active()) {
-						scale_freelook_speed(zoom_factor);
-					} else {
-						scale_cursor_distance(1.0 / zoom_factor);
-					}
+					scale_cursor_distance(1.0 / zoom_factor);
 				}
 			} break;
 
 			case BUTTON_WHEEL_DOWN: {
-				if (b->get_alt()) {
-					scale_fov(0.05);
+				if (is_freelook_active()) {
+					scale_freelook_speed(1.0 / zoom_factor);
 				} else {
-					if (is_freelook_active()) {
-						scale_freelook_speed(1.0 / zoom_factor);
-					} else {
-						scale_cursor_distance(zoom_factor);
-					}
+					scale_cursor_distance(zoom_factor);
 				}
 			} break;