Remove references to non-existent Resource type

These getters are unused and the type does not exist in `dart:core`.

Change-Id: Ib22e47a07cde454dd60ea713a6813e908b7b65b3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/97123
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Commit-Queue: Nate Bosch <nbosch@google.com>
diff --git a/pkg/compiler/lib/src/common_elements.dart b/pkg/compiler/lib/src/common_elements.dart
index 9a3d3c6..4ca6b63 100644
--- a/pkg/compiler/lib/src/common_elements.dart
+++ b/pkg/compiler/lib/src/common_elements.dart
@@ -136,9 +136,6 @@
   /// The `double` type defined in 'dart:core'.
   InterfaceType get doubleType;
 
-  /// The `Resource` type defined in 'dart:core'.
-  InterfaceType get resourceType;
-
   /// The `String` type defined in 'dart:core'.
   InterfaceType get stringType;
 
@@ -852,10 +849,6 @@
   @override
   InterfaceType get doubleType => _getRawType(doubleClass);
 
-  /// The `Resource` type defined in 'dart:core'.
-  @override
-  InterfaceType get resourceType => _getRawType(resourceClass);
-
   /// The `String` type defined in 'dart:core'.
   @override
   InterfaceType get stringType => _getRawType(stringClass);