Fix duplicate variable declarations for AWS IAM database authentication

- Remove duplicate database_passwordless_aws_use_iam variable
- Remove duplicate database_passwordless_aws_region variable
- Variables are now declared only once as intended

Author: raviharshicorp

modules/runtime_container_engine_config/variables.tf

@@ -118,18 +118,6 @@ variable "database_passwordless_aws_region" {
   description = "AWS region for IAM database authentication. Required when database_passwordless_aws_use_iam is true."
 }
 
-variable "database_passwordless_aws_use_iam" {
-  default     = false
-  type        = bool
-  description = "Whether or not to use AWS IAM authentication to connect to the PostgreSQL database. Defaults to false if no value is given."
-}
-
-variable "database_passwordless_aws_region" {
-  default     = ""
-  type        = string
-  description = "AWS region for IAM database authentication. Required when database_passwordless_aws_use_iam is true."
-}
-
 variable "explorer_database_host" {
   type        = string
   default     = null