pipeline: Clean-up AWS keys manipulation for temp bucket

This is now handled by the code in mendertesting, see:
https://github.com/mendersoftware/mendertesting/pull/160

Changelog: None

Signed-off-by: Lluis Campos <lluis.campos@northern.tech>

.gitlab-ci.yml

@@ -98,9 +98,6 @@ build:
   tags:
     - mender-qa-slave
   before_script:
-    - export AWS_ACCESS_KEY_ID=$TMP_STORAGE_AWS_ACCESS_KEY_ID
-    - export AWS_SECRET_ACCESS_KEY=$TMP_STORAGE_AWS_SECRET_ACCESS_KEY
-
     - apt update && apt install -yy bash wget unzip awscli docker.io curl
 
     - export IMAGE_NAME=$DOCKER_REPOSITORY:pr
@@ -149,8 +146,6 @@ convert_raspbian_raspberrypi4:
     - mender-qa-slave
   timeout: 2h
   before_script:
-    - export AWS_ACCESS_KEY_ID=$TMP_STORAGE_AWS_ACCESS_KEY_ID
-    - export AWS_SECRET_ACCESS_KEY=$TMP_STORAGE_AWS_SECRET_ACCESS_KEY
     # Install dependencies
     - apt update
     - apt install -qyy bash wget git util-linux mtools python3 python3-pip
@@ -250,10 +245,6 @@ test_acceptance_ubuntu:
   stage: publish
   image: debian:buster
   before_script:
-    - export PUBLISH_AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID
-    - export PUBLISH_AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY
-    - export AWS_ACCESS_KEY_ID=$TMP_STORAGE_AWS_ACCESS_KEY_ID
-    - export AWS_SECRET_ACCESS_KEY=$TMP_STORAGE_AWS_SECRET_ACCESS_KEY
     - apt update && apt install -yyq awscli curl
     - eval "$(curl https://raw.githubusercontent.com/mendersoftware/mendertesting/master/mender-ci-common.sh)"
     # Fetch artifacts from temporary S3 bucket
@@ -262,10 +253,6 @@ test_acceptance_ubuntu:
     -   tar xzf ${RASPBERRYPI_PLATFORM}.tar.gz
     - done
   script:
-    # Prepare high privilege S3 keys (the TMP_STORAGE keys are for the tmp storage only)
-    - export AWS_ACCESS_KEY_ID=$PUBLISH_AWS_ACCESS_KEY_ID
-    - export AWS_SECRET_ACCESS_KEY=$PUBLISH_AWS_SECRET_ACCESS_KEY
-
     - IMAGE_VERSION=${MENDER_CONVERT_PUBLISH_VERSION:-${CI_COMMIT_REF_NAME}}
 
     - for RASPBERRYPI_PLATFORM in raspberrypi3 raspberrypi4; do