ci: enble LLVM download for windows-gnu hosts

Author: mati865

src/ci/github-actions/jobs.yml

@@ -2,7 +2,7 @@
 # dynamically in CI from ci.yml.
 runners:
   - &base-job
-    env: { }
+    env: {}
 
   - &job-linux-4c
     os: ubuntu-20.04
@@ -58,8 +58,7 @@ envs:
     NO_DEBUG_ASSERTIONS: 1
     NO_OVERFLOW_CHECKS: 1
 
-  production:
-    &production
+  production: &production
     DEPLOY_BUCKET: rust-lang-ci2
     # AWS_SECRET_ACCESS_KEYs are stored in GitHub's secrets storage, named
     # AWS_SECRET_ACCESS_KEY_<keyid>. Including the key id in the name allows to
@@ -434,28 +433,19 @@ auto:
     env:
       RUST_CONFIGURE_ARGS: --build=i686-pc-windows-gnu
       SCRIPT: make ci-mingw
-      # We are intentionally allowing an old toolchain on this builder (and that's
-      # incompatible with LLVM downloads today).
-      NO_DOWNLOAD_CI_LLVM: 1
     <<: *job-windows-8c
 
   # x86_64-mingw is split into two jobs to run tests in parallel.
   - image: x86_64-mingw-1
     env:
       SCRIPT: make ci-mingw-x
       RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-gnu
-      # We are intentionally allowing an old toolchain on this builder (and that's
-      # incompatible with LLVM downloads today).
-      NO_DOWNLOAD_CI_LLVM: 1
     <<: *job-windows
 
   - image: x86_64-mingw-2
     env:
       SCRIPT: make ci-mingw-bootstrap
       RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-gnu
-      # We are intentionally allowing an old toolchain on this builder (and that's
-      # incompatible with LLVM downloads today).
-      NO_DOWNLOAD_CI_LLVM: 1
     <<: *job-windows
 
   - image: dist-x86_64-msvc
@@ -502,9 +492,6 @@ auto:
       RUST_CONFIGURE_ARGS: >-
         --build=i686-pc-windows-gnu
         --enable-full-tools
-      # We are intentionally allowing an old toolchain on this builder (and that's
-      # incompatible with LLVM downloads today).
-      NO_DOWNLOAD_CI_LLVM: 1
       SCRIPT: python x.py dist bootstrap --include-default-paths
       DIST_REQUIRE_ALL_TOOLS: 1
       CODEGEN_BACKENDS: llvm,cranelift
@@ -516,9 +503,6 @@ auto:
       RUST_CONFIGURE_ARGS: >-
         --build=x86_64-pc-windows-gnu
         --enable-full-tools
-      # We are intentionally allowing an old toolchain on this builder (and that's
-      # incompatible with LLVM downloads today).
-      NO_DOWNLOAD_CI_LLVM: 1
       DIST_REQUIRE_ALL_TOOLS: 1
       CODEGEN_BACKENDS: llvm,cranelift
     <<: *job-windows