Merge pull request #54 from aaronfranke/env

Update default_env.tres to the Godot 3.1/3.2 default environment

default_env.tres

@@ -1,13 +1,6 @@
 [gd_resource type="Environment" load_steps=2 format=2]
 
 [sub_resource type="ProceduralSky" id=1]
-sky_top_color = Color( 0.0470588, 0.454902, 0.976471, 1 )
-sky_horizon_color = Color( 0.556863, 0.823529, 0.909804, 1 )
-sky_curve = 0.25
-ground_bottom_color = Color( 0.101961, 0.145098, 0.188235, 1 )
-ground_horizon_color = Color( 0.482353, 0.788235, 0.952941, 1 )
-ground_curve = 0.01
-sun_energy = 16.0
 
 [resource]
 background_mode = 2