Query lines that end with a comment are removed

Given a query like this:

```
-- query: TestQuery
SELECT
	id, grass
FROM
	mytable
WHERE
	id != 3 -- this is a valid comment
	AND grass = 'Green';
```

The entire `id != 3` line is removed, and the query ends up as this invalid statement:

```
SELECT id, grass FROM mytable WHERE AND grass = 'Green';
```
