Remove dupe test_types_in_equals (dart-lang/pubspec_parse#11)

pkgs/pubspec_parse/analysis_options.yaml

diff --git a/pkgs/pubspec_parse/analysis_options.yaml b/pkgs/pubspec_parse/analysis_options.yaml
index 84a5b8d..8cd2a0f 100644
--- a/pkgs/pubspec_parse/analysis_options.yaml
+++ b/pkgs/pubspec_parse/analysis_options.yaml
@@ -65,7 +65,6 @@
     - slash_for_doc_comments
     - super_goes_last
     - test_types_in_equals
-    - test_types_in_equals
     - throw_in_finally
     - type_init_formals
     - unawaited_futures