use material included and remove unused decal material

Signed-off-by: Scott Murray <scottmur@amazon.com>

AutomatedTesting/Gem/PythonTests/Atom/tests/hydra_AtomEditorComponents_DecalAdded.py

@@ -147,7 +147,7 @@ def AtomEditorComponents_Decal_AddedToEntity():
         Report.result(Tests.creation_redo, decal_entity.exists())
 
         # 5. Set Material property on Decal component.
-        decal_material_asset_path = os.path.join("materials", "basic_grey.azmaterial")
+        decal_material_asset_path = os.path.join("Materials", "decal", "airship_symbol_decal.azmaterial")
         decal_material_asset = Asset.find_asset_by_path(decal_material_asset_path, False)
         decal_component.set_component_property_value(AtomComponentProperties.decal('Material'), decal_material_asset.id)
         get_material_property = decal_component.get_component_property_value(AtomComponentProperties.decal('Material'))

AutomatedTesting/Materials/decal/scorch_01_decal.material

@@ -1,35 +0,0 @@
-{
-    "materialType": "Materials/Types/StandardPBR.materialtype",
-    "materialTypeVersion": 4,
-    "properties": {
-        "baseColor": {
-            "textureMap": "Materials/decal/scorch_01_decal.tif"
-        },
-        "general": {
-            "doubleSided": true
-        },
-        "metallic": {
-            "useTexture": false
-        },
-        "normal": {
-            "useTexture": false
-        },
-        "opacity": {
-            "factor": 1.0,
-            "mode": "Blended",
-            "textureMap": "Materials/decal/scorch_01_decal.tif"
-        },
-        "roughness": {
-            "useTexture": false
-        },
-        "specularF0": {
-            "useTexture": false
-        },
-        "uv": {
-            "center": [
-                0.0,
-                1.0
-            ]
-        }
-    }
-}

AutomatedTesting/Materials/decal/scorch_01_decal.tif

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:889072da11d2034a0d37ec6ae81b551a61b62d6d602965b0b919a999c56d67e2
-size 16793812