Revert "cps-ir: Add support for intercepted calls."

pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart

Index: pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
index 9e5ae4b6e9e79a3768acdf0894b133dc50c7bbc9..177d61148bf0aa4ac35ef6cb7461fe6dc1ff2ea2 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
@@ -229,10 +229,6 @@ class SExpressionStringifier extends Visitor<String> with Indentation {
     String right = access(node.right);
     return '(Identical $left $right)';
   }
-
-  String visitInterceptor(Interceptor node) {
-    return '(Interceptor ${node.input})';
-  }
 }
 
 class _Namer {