Fix typo (transformer.dart missing extension)

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=132108864
diff --git a/lib/transformer.dart b/lib/transformer.dart
deleted file mode 100644
index 4031f0a..0000000
--- a/lib/transformer.dart
+++ /dev/null
@@ -1,12 +0,0 @@
-/// This is a redirector so that people can continue, in google3, to depend on
-/// the transformer as -intl, not needing to change it to intl_translation.
-//
-// Note that this is not exported into the opensource version, and would not
-// work there, since it depends on a library not in ourpubspec. It is a complete
-// hack and google3 specific. Fortunately, transformers in general are
-// deprecated so it should go away soon.
-
-// TODO(alanknight): Remove this.
-library transformer_forwarder;
-
-export 'package:intl_translation/transformer.dart';
\ No newline at end of file