Make ts happy

src/Materials/material.ts

@@ -7,7 +7,7 @@ import { Nullable } from "../types";
 import { Scene } from "../scene";
 import { Matrix } from "../Maths/math.vector";
 import { EngineStore } from "../Engines/engineStore";
-import { BaseSubMesh, SubMesh } from "../Meshes/subMesh";
+import { SubMesh } from "../Meshes/subMesh";
 import { Geometry } from "../Meshes/geometry";
 import { AbstractMesh } from "../Meshes/abstractMesh";
 import { UniformBuffer } from "./uniformBuffer";