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478eabdb - Remove redundant code (redundant since 2008-10-19).

Remove redundant code (redundant since 2008-10-19). * gnulib-local/modules/wait-process.diff: Remove file. * gnulib-local/m4/unionwait.m4: Remove file. * gnulib-local/Makefile.am (EXTRA_DIST): Remove them.