restore query web --as-table to working order (#12693)

# Description

This PR fixes a problem introduced with PR
#12236. That PR accidentally
stopped `--as-table` from working.

Closes #12689

It works again.

![image](https://github.com/nushell/nushell/assets/343840/b517507f-6b92-4e39-a389-5c69907d77c0)

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crates/nu_plugin_query/src/query_web.rs

@@ -126,10 +126,6 @@ pub fn parse_selector_params(call: &EvaluatedCall, input: &Value) -> Result<Valu
  .with_label(err.to_string(), query.span)
  .with_help("cannot parse this query as a valid CSS selector"));
  }
- } else {
- return Err(
- LabeledError::new("Missing query argument").with_label("add --query here", call.head)
- );
  }
 
  let selector = Selector {