xfree86: os-support: drop unused NO_OSLIB_PROTOTYPES guard
The last user was removed a decade ago by commit a6fcb154.
Signed-off-by: Enrico Weigelt, metux IT consult info@metux.net
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The last user was removed a decade ago by commit a6fcb154.
Signed-off-by: Enrico Weigelt, metux IT consult info@metux.net