diff --git a/cli/tools/vendor/mappings.rs b/cli/tools/vendor/mappings.rs
index d1152b12b4..57571cf111 100644
--- a/cli/tools/vendor/mappings.rs
+++ b/cli/tools/vendor/mappings.rs
@@ -133,7 +133,6 @@ impl Mappings {
       self
         .mappings
         .get(specifier)
-        .as_ref()
         .unwrap_or_else(|| {
           panic!("Could not find local path for {}", specifier)
         })