Remove 16 bytes from Node0

ConflictSet.cpp

@@ -211,9 +211,6 @@ struct Child {
 };
 
 struct Node0 : Node {
-  // Sorted
-  uint8_t index[16]; // 16 so that we can use the same simd index search
-                     // implementation as Node16
   Node0() { this->type = Type::Node0; }
   uint8_t *partialKey() { return (uint8_t *)(this + 1); }
 };