Bump minimum SQLite version to 3.8

These OS versions have SQLite 3.8 or higher by default.

- macOS 10.10 (Yosemite) or higher
- Ubuntu 14.04 LTS or higher

Raising the minimum version of SQLite 3.8 introduces these changes:

- All of bundled adapters support `supports_multi_insert?`
- SQLite 3.8 always satisifies `supports_foreign_keys_in_create?` and `supports_partial_index?`
- sqlite adapter can support `alter_table` method for foreign key referenced tables by #32865
- Deprecated `supports_multi_insert?` method

1 files changed, 1 insertions, 7 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
index 54dc917e99..199674f531 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
@@ -1062,13 +1062,7 @@ module ActiveRecord
           if (duplicate = inserting.detect { |v| inserting.count(v) > 1 })
             raise "Duplicate migration #{duplicate}. Please renumber your migrations to resolve the conflict."
           end
-          if supports_multi_insert?
-            execute insert_versions_sql(inserting)
-          else
-            inserting.each do |v|
-              execute insert_versions_sql(v)
-            end
-          end
+          execute insert_versions_sql(inserting)
         end
       end