Remove duplicate IAM authentication variables

Author: raviharshicorp

variables.tf

@@ -228,11 +228,6 @@ variable "db_username" {
   description = "PostgreSQL instance username. No special characters."
 }
 
-variable "db_iam_username" {
-  default     = null
-  type        = string
-  description = "PostgreSQL IAM username for TFE connection when IAM auth is enabled. If null, uses db_username. No special characters."
-}
 
 variable "db_backup_retention" {
   type        = number
@@ -902,14 +897,6 @@ variable "extern_vault_token_renew" {
   description = "(Optional if var.extern_vault_enable = true) How often (in seconds) to renew the Vault token."
 }
 
-# IAM Authentication variables
-variable "redis_enable_iam_auth" {
-  type        = bool
-  default     = false
-  description = "Whether to enable IAM authentication for Redis. Used for passwordless authentication."
-}
-
-variable "db_iam_username" {
   type        = string
   default     = null
   description = "The IAM username for database authentication. Required when postgres_enable_iam_auth is true."