convert uri contributor to use new task model

pkg/analysis_server/test/services/completion/test_all.dart

Index: pkg/analysis_server/test/services/completion/test_all.dart
diff --git a/pkg/analysis_server/test/services/completion/test_all.dart b/pkg/analysis_server/test/services/completion/test_all.dart
index 85150282c9fea75a775210cc350da9e531e9cd9e..dc38d146456b3282c37ae491f4774422be00f7f7 100644
--- a/pkg/analysis_server/test/services/completion/test_all.dart
+++ b/pkg/analysis_server/test/services/completion/test_all.dart
@@ -18,7 +18,6 @@ import 'local_reference_contributor_test.dart'
     as local_reference_contributor_test;
 import 'optype_test.dart' as optype_test;
 import 'prefixed_element_contributor_test.dart' as invocation_test;
-import 'uri_contributor_test.dart' as uri_contributor_test;
 
 /// Utility for manually running all tests.
 main() {
@@ -34,6 +33,5 @@ main() {
     local_declaration_visitor_test.main();
     local_reference_contributor_test.main();
     optype_test.main();
-    uri_contributor_test.main();
   });
 }