misc: remove compiler_unsupported entry in .packages file

Change-Id: I22ec6c8e2e67034e9525e8031ffdf3fa4dde0546
Reviewed-on: https://dart-review.googlesource.com/69800
Reviewed-by: Devon Carew <devoncarew@google.com>
Commit-Queue: Kevin Moore <kevmoo@google.com>
diff --git a/.packages b/.packages
index 84345fb..b459b60 100644
--- a/.packages
+++ b/.packages
@@ -23,8 +23,6 @@
 cli_util:third_party/pkg/cli_util/lib
 collection:third_party/pkg/collection/lib
 compiler:pkg/compiler/lib
-# Compiler is imported as compiler_unsupported so it can work outside the SDK.
-compiler_unsupported:pkg/compiler/lib
 convert:third_party/pkg/convert/lib
 crypto:third_party/pkg/crypto/lib
 csslib:third_party/pkg/csslib/lib