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

# Description

This PR fixes a problem introduced with PR
https://github.com/nushell/nushell/pull/12236. That PR accidentally
stopped `--as-table` from working.

Closes https://github.com/nushell/nushell/issues/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 {