Increase the severity of the unused_import hint (to a warning).

Change-Id: Ie65eb7e9c0f48c54a1c537e821c88a5ea8451266
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/119101
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Devon Carew <devoncarew@google.com>

pkg/analysis_server/analysis_options.yaml

@@ -1,4 +1,5 @@
 include: package:pedantic/analysis_options.1.8.0.yaml
+
 analyzer:
   # This currently finds ~1,200 implicit-casts issues when enabled.
   # strong-mode:
@@ -6,6 +7,8 @@ analyzer:
   exclude:
     - test/mock_packages/**
   errors:
+    # Increase the severity of the unused_import hint.
+    unused_import: warning
     # Ignoring "style" lint rules from pedantic for now. There are pre-existing
     # violations that need to be cleaned up. Each one can be cleaned up and
     # enabled according to the value provided.

pkg/analysis_server/test/domain_edit_dartfix_test.dart

@@ -7,7 +7,6 @@ import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/edit/edit_dartfix.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
 import 'package:linter/src/rules.dart';
-import 'package:path/path.dart' as path;
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 

pkg/analyzer/analysis_options.yaml

@@ -1,9 +1,12 @@
 include: package:pedantic/analysis_options.1.8.0.yaml
+
 analyzer:
   # This currently finds ~4,500 implicit-casts issues when enabled.
   # strong-mode:
   #   implicit-casts: false
   errors:
+    # Increase the severity of the unused_import hint.
+    unused_import: warning
     # Ignoring "style" lint rules from pedantic for now. There are pre-existing
     # violations that need to be cleaned up. Each one can be cleaned up and
     # enabled according to the value provided.

pkg/analyzer_cli/analysis_options.yaml

@@ -1,6 +1,9 @@
 analyzer:
   strong-mode:
     implicit-casts: false
+  errors:
+    # Increase the severity of the unused_import hint.
+    unused_import: warning
   exclude:
     - test/data/**
 linter:

pkg/dartfix/analysis_options.yaml

@@ -3,6 +3,9 @@ include: package:pedantic/analysis_options.1.8.0.yaml
 analyzer:
   strong-mode:
     implicit-casts: false
+  errors:
+    # Increase the severity of the unused_import hint.
+    unused_import: warning
 
 linter:
   rules: