Hotfix: remove duplicate row in b_plus_tree_printer (#845)

Remove duplicate row in b_plus_tree_printer graphic

Author: quantumish

src/include/storage/index/b_plus_tree_debug.h

@@ -174,11 +174,6 @@ void BPLUSTREE_TYPE::ToGraph(page_id_t page_id, const BPlusTreePage *page, std::
       out << "<TD>" << leaf->KeyAt(i) << "</TD>\n";
     }
     out << "</TR>";
-    out << "<TR>";
-    for (int i = 0; i < leaf->GetSize(); i++) {
-      out << "<TD>" << leaf->KeyAt(i) << "</TD>\n";
-    }
-    out << "</TR>";
     // Print table end
     out << "</TABLE>>];\n";
     // Print Leaf node link if there is a next page