diff --git a/src/protocol/lexer.rs b/src/protocol/lexer.rs
index 899c94b56269f342729fbef52b089ce4fe8f8145..29ed1c92942d206de98b701953917367d665bd00 100644
--- a/src/protocol/lexer.rs
+++ b/src/protocol/lexer.rs
@@ -1261,19 +1261,6 @@ impl Lexer<'_> {
         }
         Ok(result)
     }
-    fn consume_binding_expression(&mut self, h: &mut Heap) -> Result<ExpressionId, ParseError> {
-        if self.has_string("let") {
-            let position = self.source.pos();
-            self.consume_whitespace(true)?;
-            let left_expr = self.consume_expression(h)?;
-            self.consume_whitespace(false)?;
-            self.consume_string(b"=")?;
-            self.consume_whitespace(false)?;
-            let right_expr = self.consume_expression(h)?;
-        } else {
-            self.consume_prefix_expression(h)
-        }
-    }
     fn consume_prefix_expression(&mut self, h: &mut Heap) -> Result<ExpressionId, ParseError> {
         if self.has_string(b"+")
             || self.has_string(b"-")