{Build} GitHub CI - Python Wheels generation

Summary: Rely only on `pyproject.toml` to define CMAKE_OSX_DEPLOYMENT_TARGET. Keeping it to 10.15 is improving compatibility with more macOS target

Reviewed By: PiotrBrzyski

Differential Revision: D52926367

fbshipit-source-id: 5a21d1ee216251905acc1795051b07cf562492bb

.github/workflows/build-wheels-and-deploy.yml

@@ -116,7 +116,6 @@ jobs:
           CIBW_BUILD_VERBOSITY: 3
           CIBW_BUILD: ${{ matrix.cibw_build }}
           CIBW_SKIP: "*-manylinux_i686 *-musllinux_*"
-          MACOSX_DEPLOYMENT_TARGET: '12'
       - uses: actions/upload-artifact@v2
         with:
           name: python-package-distributions