fix migration file name and test

Author: johha

spec/migrations/20241016118000_drop_unique_constraint_quota_definitions_name_key_spec.rb

@@ -3,7 +3,7 @@
 
 RSpec.describe 'migration to add or remove unique constraint on name column in quota_definitions table', isolation: :truncation, type: :migration do
   include_context 'migration' do
-    let(:migration_filename) { '20241016118000_drop_unique_constraint_quota_definitions_name_key_spec.rb' }
+    let(:migration_filename) { '20241016118000_drop_unique_constraint_quota_definitions_name_key.rb' }
   end
   describe 'up migration' do
     context 'mysql' do
@@ -17,7 +17,6 @@
         expect(db.indexes(:quota_definitions)).not_to include(:name)
 
         # Test idempotency: if constraint already removed, doesn't error
-        db.drop_index :quota_definitions, :name, name: :name, if_exists: true
         expect { Sequel::Migrator.run(db, migrations_path, target: current_migration_index, allow_missing_migration_files: true) }.not_to raise_error
         expect(db.indexes(:quota_definitions)).not_to include(:name)
       end