Remove aabb from the nodes module

include/nodes.h

@@ -37,7 +37,6 @@ struct node {
   node_data_t data;
 };
 
-bool aabb(const node_t *node, i32 x, i32 y);
 void draw_node(const window_t *wnd, const node_t *node);
 
 #endif // !NODES_H