Don't pass unused `connection` to `FixtureSet.new`

The `@connection` is no longer used since ee5ab22.

Originally the `@connection` was useless because it is only used in
`timestamp_column_names`, which is only used if `model_class` is given.

If `model_class` is given, the `@connection` is always
`model_class.connection`.

1 files changed, 2 insertions, 5 deletions

diff --git a/activerecord/lib/active_record/fixtures.rb b/activerecord/lib/active_record/fixtures.rb
index b090c76a38..1dead09073 100644
--- a/activerecord/lib/active_record/fixtures.rb
+++ b/activerecord/lib/active_record/fixtures.rb
@@ -577,9 +577,8 @@ module ActiveRecord
         fixtures_map = {}
         fixture_sets = fixture_files.map do |fixture_set_name|
           klass = class_names[fixture_set_name]
-          conn = klass&.connection || connection
           fixtures_map[fixture_set_name] = new( # ActiveRecord::FixtureSet.new
-            conn,
+            nil,
             fixture_set_name,
             klass,
             ::File.join(fixtures_directory, fixture_set_name)
@@ -621,7 +620,7 @@ module ActiveRecord
 
     attr_reader :table_name, :name, :fixtures, :model_class, :config
 
-    def initialize(connection, name, class_name, path, config = ActiveRecord::Base)
+    def initialize(_, name, class_name, path, config = ActiveRecord::Base)
       @name     = name
       @path     = path
       @config   = config
@@ -630,8 +629,6 @@ module ActiveRecord
 
       @fixtures = read_fixture_files(path)
 
-      @connection = connection
-
       @table_name = (model_class.respond_to?(:table_name) ?
                       model_class.table_name :
                       self.class.default_fixture_table_name(name, config))