go/libraries/doltcore/table/untyped/xlsx: Fix bug where this spammed internal representation of the imported rows to Stdout.

These lines were not visible from the CLI because of color, but it still cost
performance. In an embedded context, these could end up in stdout.

go/libraries/doltcore/table/untyped/xlsx/marshaling.go

@@ -99,7 +99,6 @@ func decodeXLSXRows(ctx context.Context, vrw types.ValueReadWriter, xlData [][][
 			}
 
 			rows = append(rows, r)
-			fmt.Println(rows)
 		}
 
 	}