eremove useless assertion test.

code/FBXExporter.cpp

@@ -2446,7 +2446,6 @@ void FBXExporter::WriteAnimationCurve(
     // TODO: keyattr flags and data (STUB for now)
     n.AddChild("KeyAttrFlags", std::vector<int32_t>{0});
     n.AddChild("KeyAttrDataFloat", std::vector<float>{0,0,0,0});
-    ai_assert(static_cast<int32_t>(times.size()) <= std::numeric_limits<int32_t>::max());
     n.AddChild(
         "KeyAttrRefCount",
         std::vector<int32_t>{static_cast<int32_t>(times.size())}