gcc: Make gcc 11.3 build on Darwin (#30278)
Don't apply a Darwin-specific patch that doesn't work on 11.3 any more. Closes https://github.com/spack/spack/issues/30264.
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Don't apply a Darwin-specific patch that doesn't work on 11.3 any more. Closes https://github.com/spack/spack/issues/30264.