Revert "Introducing NXP Neutron runtime (#10563)"

This reverts commit 967cfae.

Author: metascroy

.github/workflows/trunk.yml

@@ -271,36 +271,6 @@ jobs:
           exit 1
         fi
 
-  nxp-build-test:
-    name: nxp-build-test
-    uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main
-    permissions:
-      id-token: write
-      contents: read
-    with:
-      runner: linux.2xlarge
-      docker-image: executorch-ubuntu-22.04-arm-sdk
-      submodules: 'recursive'
-      ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
-      timeout: 90
-      script: |
-        # The generic Linux job chooses to use base env, not the one setup by the image
-        CONDA_ENV=$(conda env list --json | jq -r ".envs | .[-1]")
-        conda activate "${CONDA_ENV}"
-
-        # Build
-        cmake -DEXECUTORCH_BUILD_NXP_NEUTRON=ON -Bcmake-out .
-        cmake --build cmake-out --target executorch_delegate_neutron --config Release
-
-        # Build check for the neutron backend library
-        lib_neutron="cmake-out/backends/nxp/libexecutorch_delegate_neutron.a"
-        if [ -f $lib_neutron ]; then
-            echo "Neutron backend library built."
-        else
-            echo "Neutron backend library not found!"
-            exit 1
-        fi
-
   test-coreml-delegate:
     name: test-coreml-delegate
     uses: pytorch/test-infra/.github/workflows/macos_job.yml@main

CMakeLists.txt

@@ -502,10 +502,6 @@ if(EXECUTORCH_BUILD_CADENCE)
   add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/backends/cadence)
 endif()
 
-if(EXECUTORCH_BUILD_NXP_NEUTRON)
-  add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/backends/nxp)
-endif()
-
 if(EXECUTORCH_BUILD_COREML)
   add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/backends/apple/coreml)
 endif()