Removing a non-existent index does not raise an error.

Author: metaskills

lib/active_record/connection_adapters/sqlserver_adapter.rb

@@ -664,7 +664,7 @@ def rename_column(table_name, column_name, new_column_name)
       end
 
       def remove_index(table_name, options = {})
-        do_execute "DROP INDEX #{table_name}.#{quote_column_name(index_name(table_name, options))}"
+        do_execute "DROP INDEX #{table_name}.#{quote_column_name(index_name(table_name, options))}" rescue nil
       end
 
       def type_to_sql(type, limit = nil, precision = nil, scale = nil)