chore: fix amplify builds

Author: Tom McCarthy

amplify.yml

@@ -2,13 +2,11 @@ version: 1
 env:
   variables:
       ORIGIN: https://${AWS_BRANCH//\//-}.${AWS_APP_ID}.amplifyapp.com
+      STACKNAME: amplify-aws-serverless-shopping-cart
 backend:
   phases:
     preBuild:
       commands:
-        - curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
-        - unzip awscliv2.zip
-        - ./aws/install
         - pip3 install --upgrade aws-sam-cli
     build:
       commands: