GHA/curl-for-win: tidy up `DOCKER_CONTENT_TRUST`

Follow-up to 08d13c0e46ab535b04c4099d6c51d51f7c288b6c
Closes #15141

diff --git a/.github/workflows/curl-for-win.yml b/.github/workflows/curl-for-win.yml
index 770d07b1820b101f3c69b97845009b5e2f232b10..4a23c0523a4b1e6b7203646696af632594bdd2b0 100644 (file)
--- a/.github/workflows/curl-for-win.yml
+++ b/.github/workflows/curl-for-win.yml
@@ -40,7 +40,6 @@ env:
   CW_MAP: '0'
   CW_JOBS: '5'
   CW_NOPKG: '1'
-  DOCKER_CONTENT_TRUST: ''
 
 jobs:
   linux-glibc-llvm:
@@ -58,7 +57,7 @@ jobs:
           export CW_CONFIG='-main-werror-linux-a64-x64'
           export CW_REVISION='${{ github.sha }}'
           DOCKER_IMAGE='debian:bookworm-slim'
-          export DOCKER_CONTENT_TRUST=1
+          DOCKER_CONTENT_TRUST=1
           export CW_CCSUFFIX='-15'
           export CW_GCCSUFFIX='-12'
           docker trust inspect --pretty "${DOCKER_IMAGE}"