diff --git a/guides/source/6_1_release_notes.md b/guides/source/6_1_release_notes.md
index a8c46ad007..23f3496cab 100644
--- a/guides/source/6_1_release_notes.md
+++ b/guides/source/6_1_release_notes.md
@@ -37,6 +37,8 @@ Please refer to the [Changelog][railties] for detailed changes.
 
 *   Remove deprecated `connection` option in the `rails dbconsole` command.
 
+*   Remove deprecated `SOURCE_ANNOTATION_DIRECTORIES` environment variable support from `rails notes`.
+
 ### Deprecations
 
 ### Notable changes
diff --git a/railties/CHANGELOG.md b/railties/CHANGELOG.md
index 7dfd4168ac..e48db6a39b 100644
--- a/railties/CHANGELOG.md
+++ b/railties/CHANGELOG.md
@@ -1,3 +1,7 @@
+*   Remove deprecated `SOURCE_ANNOTATION_DIRECTORIES` environment variable support from `rails notes`.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated `connection` option in the `rails dbconsole` command.
 
     *Rafael Mendonça França*
diff --git a/railties/lib/rails/commands/notes/notes_command.rb b/railties/lib/rails/commands/notes/notes_command.rb
index 94cf183855..21900ce545 100644
--- a/railties/lib/rails/commands/notes/notes_command.rb
+++ b/railties/lib/rails/commands/notes/notes_command.rb
@@ -10,7 +10,6 @@ module Rails
       def perform(*)
         require_application_and_environment!
 
-        deprecation_warning
         display_annotations
       end
 
@@ -23,16 +22,7 @@ module Rails
         end
 
         def directories
-          Rails::SourceAnnotationExtractor::Annotation.directories + source_annotation_directories
-        end
-
-        def deprecation_warning
-          return if source_annotation_directories.empty?
-          ActiveSupport::Deprecation.warn("`SOURCE_ANNOTATION_DIRECTORIES` is deprecated and will be removed in Rails 6.1. You can add default directories by using config.annotations.register_directories instead.")
-        end
-
-        def source_annotation_directories
-          ENV["SOURCE_ANNOTATION_DIRECTORIES"].to_s.split(",")
+          Rails::SourceAnnotationExtractor::Annotation.directories
         end
     end
   end