demo-4 updates

demo-4/provider.tf

@@ -1,6 +1,3 @@
-provider "aws" {
-    access_key = "${var.AWS_ACCESS_KEY}"
-    secret_key = "${var.AWS_SECRET_KEY}"
+provider "aws" { 
     region = "${var.AWS_REGION}"
 }
-

demo-4/vars.tf

@@ -1,5 +1,3 @@
-variable "AWS_ACCESS_KEY" {}
-variable "AWS_SECRET_KEY" {}
 variable "AWS_REGION" {
   default = "eu-west-1"
 }