Fix clippy (#15489)

# Description
There are some clippy(version 0.1.86) errors on nushell repo. This pr is
trying to fix it.

# User-Facing Changes
Hopefully none.

# Tests + Formatting
NaN

# After Submitting
NaN

crates/nu-command/src/math/utils.rs

@@ -102,7 +102,7 @@ pub fn calculate(
             mf(&new_vals?, span, name)
         }
         PipelineData::Value(val, ..) => mf(&[val], span, name),
-        PipelineData::Empty { .. } => Err(ShellError::PipelineEmpty { dst_span: name }),
+        PipelineData::Empty => Err(ShellError::PipelineEmpty { dst_span: name }),
         val => Err(ShellError::UnsupportedInput {
             msg: "Only ints, floats, lists, records, or ranges are supported".into(),
             input: "value originates from here".into(),