Remove unused constants from ViewerRenderer

viewer/glow-extras/viewer/ViewerRenderer.cc

@@ -338,7 +338,6 @@ void glow::viewer::ViewerRenderer::renderSubview(const tg::ivec2& res, tg::ivec2
             shader["uGroundY"] = groundY;
             shader["uCamPos"] = camPos;
             shader["uMeshDiag"] = boundingInfo.diagonal;
-            shader["uMeshScale"] = mMeshScale;
             shader["uMeshCenter"] = glm::vec3(boundingInfo.center.x, boundingInfo.center.y, boundingInfo.center.z);
             shader["uShadowStrength"] = scene.enableShadows ? mShadowStrength : 0.f;
             shader["uGroundShadowMin"] = groundShadowAabb.min;