Removed env variables and defined CI_BUILD variable globally

.github/workflows/build_wheels_macos_m1.yml

@@ -27,6 +27,7 @@ jobs:
         build_sdist: [0]
 
     env:
+      CI_BUILD: 1
       SDIST: ${{ matrix.build_sdist || 0 }}
       ENABLE_HEADLESS: ${{ matrix.without_gui }}
       ENABLE_CONTRIB: ${{ matrix.with_contrib }}
@@ -49,7 +50,7 @@ jobs:
         echo $ENABLE_CONTRIB > contrib.enabled
         echo $ENABLE_HEADLESS > headless.enabled
         export MACOSX_DEPLOYMENT_TARGET=11.0
-        arch -arm64 -e SDIST=${{ matrix.build_sdist }} -e ENABLE_HEADLESS=${{ matrix.without_gui }} -e ENABLE_CONTRIB=${{ matrix.with_contrib }} python${{ matrix.python-version }} -m pip wheel --wheel-dir=wheelhouse . --verbose
+        arch -arm64 python${{ matrix.python-version }} -m pip wheel --wheel-dir=wheelhouse . --verbose
         delocate-wheel ${{ github.workspace }}/wheelhouse/opencv*
 
     - name: before test