remove_foreign_key

# File activerecord/lib/active_record/connection_adapters/sqlite3/schema_statements.rb, line 62
        def remove_foreign_key(from_table, to_table = nil, **options)
          return if options.delete(:if_exists) == true && !foreign_key_exists?(from_table, to_table)

          to_table ||= options[:to_table]
          options = options.except(:name, :to_table, :validate)
          foreign_keys = foreign_keys(from_table)

          fkey = foreign_keys.detect do |fk|
            table = to_table || begin
              table = options[:column].to_s.delete_suffix("_id")
              Base.pluralize_table_names ? table.pluralize : table
            end
            table = strip_table_name_prefix_and_suffix(table)
            fk_to_table = strip_table_name_prefix_and_suffix(fk.to_table)
            fk_to_table == table && options.all? { |k, v| fk.options[k].to_s == v.to_s }
          end || raise(ArgumentError, "Table '#{from_table}' has no foreign key for #{to_table || options}")

          foreign_keys.delete(fkey)
          alter_table(from_table, foreign_keys)
        end