Revert "update CI"

This reverts commit e896fab.

Author: MarijnS95

.github/workflows/ci.yml

@@ -40,6 +40,7 @@ jobs:
           - os: macos-latest
             backend: vulkan,metal
         features:
+          - hashbrown
           - std
           - hashbrown,std
     runs-on: ${{ matrix.target.os }}
@@ -70,6 +71,7 @@ jobs:
           - os: macos-latest
             backend: vulkan,metal
         features:
+          - hashbrown
           - std
           - hashbrown,std
     runs-on: ${{ matrix.target.os }}