diff --git a/.github/workflows/clang_cmake_format_check.yaml b/.github/workflows/clang_cmake_format_check.yaml
deleted file mode 100644
index b438a8080..000000000
--- a/.github/workflows/clang_cmake_format_check.yaml
+++ /dev/null
@@ -1,37 +0,0 @@
-name: clang-cmake-format-check
-
-concurrency:
-  group: ${{ github.workflow }}#${{ github.ref }}
-  cancel-in-progress: true
-
-on:
-    push:
-
-jobs:
-  build:
-    name: clang-cmake-format-check
-    runs-on: ubuntu-20.04
-    steps:
-        - name: Fetch repository
-          uses: actions/checkout@v2
-        - name: Install clang-format 11
-          run: |
-              sudo apt-get update
-              sudo apt-get install clang-format-11 python3-pip libboost-all-dev libopenmpi-dev openmpi-bin
-        - name: Install cmake-format 0.6.13
-          run:  python3 -m pip install cmake-format==0.6.13
-        - name: Configure
-          shell: bash
-          working-directory: ${{runner.workspace}}/CoreNeuron
-          run: |
-              export PATH=/home/runner/.local/bin:$PATH
-              mkdir BUILD && cd BUILD
-              cmake -DCORENRN_CLANG_FORMAT=ON -DCORENRN_CMAKE_FORMAT=ON -DCORENRN_ENABLE_MPI=ON -DCORENRN_ENABLE_OPENMP=OFF -DClangFormat_EXECUTABLE=$(which clang-format-11) -DCMakeFormat_EXECUTABLE=$(which cmake-format) ..
-        - name: Run clang-format
-          shell: bash
-          working-directory: ${{runner.workspace}}/CoreNeuron/BUILD
-          run: make check-clang-format VERBOSE=1
-        - name: Run cmake-format
-          shell: bash
-          working-directory: ${{runner.workspace}}/CoreNeuron/BUILD
-          run: make check-cmake-format
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5e3967f7d..1d89f8eca 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -35,9 +35,6 @@ spack_setup:
     - git diff
     - fi
 
-.spack_intel:
-  variables:
-    SPACK_PACKAGE_COMPILER: intel
 .spack_nvhpc:
   variables:
     SPACK_PACKAGE_COMPILER: nvhpc
@@ -50,16 +47,6 @@ spack_setup:
   variables:
     bb5_constraint: volta
 
-build:nmodl:intel:
-  stage: build_nmodl
-  variables:
-    SPACK_PACKAGE: nmodl
-    SPACK_PACKAGE_REF: ''
-    SPACK_PACKAGE_SPEC: ~legacy-unit
-  extends:
-    - .spack_build
-    - .spack_intel
-
 build:nmodl:gpu:
   stage: build_nmodl
   variables:
@@ -71,23 +58,6 @@ build:nmodl:gpu:
     - .spack_build
     - .spack_nvhpc
 
-build:coreneuron+nmodl:intel:
-  variables:
-    SPACK_PACKAGE: coreneuron
-    SPACK_PACKAGE_SPEC: +nmodl+tests~legacy-unit build_type=Debug
-  extends:
-    - .spack_build
-    - .spack_intel
-  needs: ["build:nmodl:intel"]
-
-build:coreneuron:intel:
-  variables:
-    SPACK_PACKAGE: coreneuron
-    SPACK_PACKAGE_SPEC: +tests~legacy-unit build_type=Debug
-  extends:
-    - .spack_build
-    - .spack_intel
-
 build:coreneuron+nmodl:gpu:
   variables:
     SPACK_PACKAGE: coreneuron
@@ -99,48 +69,10 @@ build:coreneuron+nmodl:gpu:
     - .spack_nvhpc
   needs: ["build:nmodl:gpu"]
 
-build:coreneuron:gpu:
-  variables:
-    SPACK_PACKAGE: coreneuron
-    # +report pulls in a lot of dependencies and the tests fail.
-    # See https://github.com/BlueBrain/CoreNeuron/issues/518 re: build_type
-    SPACK_PACKAGE_SPEC: +gpu+tests~legacy-unit~report build_type=RelWithDebInfo
-  extends:
-    - .spack_build
-    - .spack_nvhpc
-
-test:coreneuron+nmodl:intel:
-  extends: [.ctest]
-  needs: ["build:coreneuron+nmodl:intel"]
-
-test:coreneuron:intel:
-  extends: [.ctest]
-  needs: ["build:coreneuron:intel"]
-
 test:coreneuron+nmodl:gpu:
   extends: [.ctest, .gpu_node]
   needs: ["build:coreneuron+nmodl:gpu"]
 
-test:coreneuron:gpu:
-  extends: [.ctest, .gpu_node]
-  needs: ["build:coreneuron:gpu"]
-
-build:neuron+nmodl:intel:
-  stage: build_neuron
-  extends:
-    - .spack_build
-    - .spack_neuron
-    - .spack_intel
-  needs: ["build:coreneuron+nmodl:intel"]
-
-build:neuron:intel:
-  stage: build_neuron
-  extends:
-    - .spack_build
-    - .spack_neuron
-    - .spack_intel
-  needs: ["build:coreneuron:intel"]
-
 build:neuron+nmodl:gpu:
   stage: build_neuron
   extends:
@@ -153,34 +85,7 @@ build:neuron+nmodl:gpu:
     - !reference [.spack_build, before_script]
   needs: ["build:coreneuron+nmodl:gpu"]
 
-build:neuron:gpu:
-  stage: build_neuron
-  extends:
-    - .spack_build
-    - .spack_neuron
-    - .spack_nvhpc
-  before_script:
-    # Build py-cython and py-numpy with GCC instead of NVHPC.
-    - SPACK_PACKAGE_DEPENDENCIES="${SPACK_PACKAGE_DEPENDENCIES}^py-cython%gcc^py-numpy%gcc"
-    - !reference [.spack_build, before_script]
-  needs: ["build:coreneuron:gpu"]
-
-test:neuron+nmodl:intel:
-  stage: test_neuron
-  extends: [.ctest]
-  needs: ["build:neuron+nmodl:intel"]
-
-test:neuron:intel:
-  stage: test_neuron
-  extends: [.ctest]
-  needs: ["build:neuron:intel"]
-
 test:neuron+nmodl:gpu:
   stage: test_neuron
   extends: [.ctest, .gpu_node]
   needs: ["build:neuron+nmodl:gpu"]
-
-test:neuron:gpu:
-  stage: test_neuron
-  extends: [.ctest, .gpu_node]
-  needs: ["build:neuron:gpu"]