diff --git a/lib/compress.js b/lib/compress.js
index effe80d5..1ea3844d 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2591,16 +2591,6 @@ merge(Compressor.prototype, {
         return self;
     });
 
-    OPT(AST_Case, function(self, compressor){
-        var value = self.expression.evaluate(compressor);
-        if (value !== self.expression) {
-            var expression = make_node_from_constant(value, self.expression).transform(compressor);
-            self.expression = best_of_expression(expression, self.expression);
-        }
-        self.body = tighten_body(self.body, compressor);
-        return self;
-    });
-
     OPT(AST_Try, function(self, compressor){
         self.body = tighten_body(self.body, compressor);
         return self;