Remove retry, as it has to be an integer and won't work with variables

shellcheck.yml

@@ -3,16 +3,13 @@ shellcheck:
   needs: []
   variables:
     IMAGE_TAG: "v${GL_ASDF_SHELLCHECK_VERSION}"
-    RETRY: 0
   rules:
     - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
     - if: '$CI_PROJECT_NAME == "common-ci-tasks" && $CI_PIPELINE_SOURCE == "merge_request_event"'
       variables:
         IMAGE_TAG: "$CI_COMMIT_REF_SLUG"
-        RETRY: 2
   image:
     name: registry.gitlab.com/gitlab-com/gl-infra/common-ci-tasks/shellcheck:${IMAGE_TAG}
-  retry: ${RETRY}
   script:
     - (
         find . -type f \( -perm -u=x -not -name "*.sh" \) -not -path "*/.*/*" -print0 | xargs -0 grep -rIzlE '^#![[:blank:]]*(/usr/bin/env sh|/usr/bin/env bash|/bin/sh|/bin/bash)';

shfmt.yml

@@ -3,16 +3,13 @@ shfmt:
   needs: []
   variables:
     IMAGE_TAG: "v${GL_ASDF_SHFMT_VERSION}"
-    RETRY: 0
   rules:
     - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
     - if: '$CI_PROJECT_NAME == "common-ci-tasks" && $CI_PIPELINE_SOURCE == "merge_request_event"'
       variables:
         IMAGE_TAG: "$CI_COMMIT_REF_SLUG"
-        RETRY: 2
   image:
     name: registry.gitlab.com/gitlab-com/gl-infra/common-ci-tasks/shfmt:${IMAGE_TAG}
-  retry: ${RETRY}
   script:
     # Find all *.sh files, and any executable script files
     - (