Remove *_roles variables in kms module

tests/modules/kms/fixture/main.tf

@@ -17,9 +17,7 @@
 module "test" {
   source               = "../../../../modules/kms"
   iam_members          = var.iam_members
-  iam_roles            = var.iam_roles
   key_iam_members      = var.key_iam_members
-  key_iam_roles        = var.key_iam_roles
   key_purpose          = var.key_purpose
   key_purpose_defaults = var.key_purpose_defaults
   keyring              = var.keyring

tests/modules/kms/fixture/variables.tf

@@ -21,11 +21,6 @@ variable "iam_members" {
   }
 }
 
-variable "iam_roles" {
-  type    = list(string)
-  default = ["roles/owner"]
-}
-
 variable "key_iam_members" {
   type = map(map(list(string)))
   default = {
@@ -35,13 +30,6 @@ variable "key_iam_members" {
   }
 }
 
-variable "key_iam_roles" {
-  type = map(list(string))
-  default = {
-    key-a = ["roles/owner"]
-  }
-}
-
 variable "key_purpose" {
   type = map(object({
     purpose = string