fix: fix unused warning on statistics in default features config

boreal/src/scanner/ac_scan.rs

@@ -9,7 +9,6 @@ use crate::atoms::pick_atom_in_literal;
 use crate::compiler::variable::Variable;
 use crate::matcher::{AcMatchStatus, Matcher};
 use crate::memory::Region;
-use crate::{statistics, timeout};
 
 /// Factorize atoms from all variables, to scan for them in a single pass.
 ///
@@ -55,10 +54,11 @@ struct LiteralInfo {
 #[derive(Debug)]
 pub struct ScanData<'a> {
     /// Object used to check if the scan times out.
-    pub timeout_checker: Option<&'a mut timeout::TimeoutChecker>,
+    pub timeout_checker: Option<&'a mut crate::timeout::TimeoutChecker>,
 
+    #[cfg(feature = "profiling")]
     /// Statistics related to the scan.
-    pub statistics: Option<&'a mut statistics::Evaluation>,
+    pub statistics: Option<&'a mut crate::statistics::Evaluation>,
 
     /// List of variables to scan.
     ///

boreal/src/scanner/mod.rs

@@ -560,6 +560,7 @@ impl Inner {
 
         let mut ac_scan_data = ac_scan::ScanData {
             timeout_checker: scan_data.timeout_checker.as_mut(),
+            #[cfg(feature = "profiling")]
             statistics: scan_data.statistics.as_mut(),
             variables: &self.variables,
             params: scan_data.params,