Revert "try with the khronos backend"

This reverts commit d472b78.

Author: christiangnrd

.github/workflows/Test.yml

@@ -135,8 +135,7 @@ jobs:
           echo 'default_memory_backend="${{ matrix.memory_backend }}"' >> test/LocalPreferences.toml
           julia --project -e '
             using Pkg
-            Pkg.develop(path="lib/intrinsics")
-            Pkg.add(name="GPUCompiler", rev="sds/khronos")'
+            Pkg.develop(path="lib/intrinsics")'
 
       - name: Test OpenCL.jl
         uses: julia-actions/julia-runtest@v1