Cleanup previous deployments (#28)

<!-- CURSOR_SUMMARY -->
> [!NOTE]
> **Medium Risk**
> This is destructive infrastructure cleanup (removes resources from
Terraform state/plans) and could tear down the dev VPC/ALB/ECS cluster
if applied; otherwise the changes are straightforward deletions.
> 
> **Overview**
> Removes the Terramate bundle instance `ecs-fargate-dev-dev` and
deletes its generated Terraform stacks for dev (`vpc`, `alb`, and
`ecs_cluster`), effectively cleaning up the previous ECS Fargate cluster
deployment.
> 
> Simplifies the remaining `terraform.tf` files in those stacks to only
pin `required_version`, dropping in-stack `required_providers` and the
`aws` provider configuration.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
bbbab0e. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: soerenmartius

cloud-services/tf-aws-complete-ecs-fargate-cluster/ecs-fargate-dev-dev.tm.yml

@@ -3,18 +3,3 @@
 terraform {
   required_version = "1.14.1"
 }
-terraform {
-  required_providers {
-    aws = {
-      source  = "hashicorp/aws"
-      version = "6.25.0"
-    }
-    null = {
-      source  = "hashicorp/null"
-      version = "3.2.0"
-    }
-  }
-}
-provider "aws" {
-  region = "us-east-1"
-}

stacks/dev/ecs-clusters/ecs-fargate-dev/alb/component_alb_main.tf

@@ -3,18 +3,3 @@
 terraform {
   required_version = "1.14.1"
 }
-terraform {
-  required_providers {
-    aws = {
-      source  = "hashicorp/aws"
-      version = "6.25.0"
-    }
-    null = {
-      source  = "hashicorp/null"
-      version = "3.2.0"
-    }
-  }
-}
-provider "aws" {
-  region = "us-east-1"
-}

stacks/dev/ecs-clusters/ecs-fargate-dev/alb/terraform.tf

@@ -3,18 +3,3 @@
 terraform {
   required_version = "1.14.1"
 }
-terraform {
-  required_providers {
-    aws = {
-      source  = "hashicorp/aws"
-      version = "6.25.0"
-    }
-    null = {
-      source  = "hashicorp/null"
-      version = "3.2.0"
-    }
-  }
-}
-provider "aws" {
-  region = "us-east-1"
-}