Proteus prefab fixes (#202)

* Proteus fixes

- Fixed errors and warnings when importing the prefab
- Removed unused entities and components
- Re-enabled collision shape for the chassis
- Minor fixes

Signed-off-by: Paweł Budziszewski <[email protected]>

* Minor fixes

Signed-off-by: Paweł Budziszewski <[email protected]>

---------

Signed-off-by: Paweł Budziszewski <[email protected]>

Gems/ProteusRobot/Assets/Materials/Proteus_chassis_Proteus.material

@@ -10,9 +10,9 @@
         "normal.textureMap": "../Textures/Proteus_Normal.png",
         "opacity.factor": 1.0,
         "roughness.factor": 0.5,
-        "roughness.lowerBound": 0.20000000298023224,
+        "roughness.lowerBound": 0.49000000953674316,
         "roughness.textureMap": "../Textures/Proteus_MaskMap_A.png",
-        "roughness.upperBound": 0.9399999976158142,
+        "roughness.upperBound": 0.15000000596046448,
         "specularF0.factor": 0.5099999904632568
     }
 }

Gems/ProteusRobot/Assets/Materials/untitled.material

@@ -1,4 +0,0 @@
-{
-    "materialType": "@gemroot:Atom_Feature_Common@/Assets/Materials/Types/StandardPBR.materialtype",
-    "materialTypeVersion": 5
-}