diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index 8f835e56bd..164821702f 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,3 +1,7 @@
+*   Remove deprecated `DatabaseConfig#config` method.
+
+    *Rafael Mendonça França*
+
 *   Rollback transactions when the block returns earlier than expected.
 
     Before this change, when a transaction block returned early, the transaction would be committed.
diff --git a/activerecord/lib/active_record/database_configurations/database_config.rb b/activerecord/lib/active_record/database_configurations/database_config.rb
index aeb22993f8..163fc6bbe3 100644
--- a/activerecord/lib/active_record/database_configurations/database_config.rb
+++ b/activerecord/lib/active_record/database_configurations/database_config.rb
@@ -20,10 +20,6 @@ module ActiveRecord
       end
       deprecate spec_name: "please use name instead"
 
-      def config
-        raise NotImplementedError
-      end
-
       def adapter_method
         "#{adapter}_connection"
       end
diff --git a/activerecord/lib/active_record/database_configurations/hash_config.rb b/activerecord/lib/active_record/database_configurations/hash_config.rb
index afa44595e7..af5f2e43f4 100644
--- a/activerecord/lib/active_record/database_configurations/hash_config.rb
+++ b/activerecord/lib/active_record/database_configurations/hash_config.rb
@@ -32,11 +32,6 @@ module ActiveRecord
         @configuration_hash = configuration_hash.symbolize_keys.freeze
       end
 
-      def config
-        ActiveSupport::Deprecation.warn("DatabaseConfig#config will be removed in 7.0.0 in favor of DatabaseConfig#configuration_hash which returns a hash with symbol keys")
-        configuration_hash.stringify_keys
-      end
-
       # Determines whether a database configuration is for a replica / readonly
       # connection. If the +replica+ key is present in the config, +replica?+ will
       # return +true+.
diff --git a/activerecord/test/cases/database_configurations_test.rb b/activerecord/test/cases/database_configurations_test.rb
index c4f0ef4d62..ef975bca4d 100644
--- a/activerecord/test/cases/database_configurations_test.rb
+++ b/activerecord/test/cases/database_configurations_test.rb
@@ -115,12 +115,6 @@ class LegacyDatabaseConfigurationsTest < ActiveRecord::TestCase
     end
   end
 
-  def test_deprecated_config_method
-    db_config = ActiveRecord::Base.configurations.configs_for(env_name: "arunit", name: "primary")
-
-    assert_equal db_config.configuration_hash.stringify_keys, assert_deprecated { db_config.config }
-  end
-
   def test_unsupported_method_raises
     assert_raises NoMethodError do
       ActiveRecord::Base.configurations.fetch(:foo)
diff --git a/guides/source/7_0_release_notes.md b/guides/source/7_0_release_notes.md
index 1a8786fc62..93823f4fab 100644
--- a/guides/source/7_0_release_notes.md
+++ b/guides/source/7_0_release_notes.md
@@ -124,6 +124,8 @@ Please refer to the [Changelog][active-record] for detailed changes.
 
 *   Remove deprecated support to pass a column to `type_cast`.
 
+*   Remove deprecated `DatabaseConfig#config` method.
+
 ### Deprecations
 
 ### Notable changes