Reduce feature gates on imports.

src/result.rs

@@ -6,9 +6,6 @@ use crate::token::{Position, NO_POS};
 use crate::utils::ImmutableString;
 use crate::INT;
 
-#[cfg(not(feature = "no_function"))]
-use crate::engine::is_anonymous_fn;
-
 use crate::stdlib::{
     boxed::Box,
     error::Error,
@@ -159,7 +156,7 @@ impl fmt::Display for EvalAltResult {
             Self::ErrorParsing(p, _) => write!(f, "Syntax error: {}", p)?,
 
             #[cfg(not(feature = "no_function"))]
-            Self::ErrorInFunctionCall(s, err, _) if is_anonymous_fn(s) => {
+            Self::ErrorInFunctionCall(s, err, _) if crate::engine::is_anonymous_fn(s) => {
                 write!(f, "Error in call to closure: {}", err)?
             }
             Self::ErrorInFunctionCall(s, err, _) => {