[PATCH] Remove __isinf_ns

[Wilco Dijkstra]

Remove all uses and definition of the internal function __isinf_ns(l/f) as there is no benefit in
having it when isinf gets inlined in math.h (I'll post that as a separate patch).

GLIBC builds and passes math tests on AArch64. OK for commit?

ChangeLog:
2015-06-15  Wilco Dijkstra  <wdijkstr@arm.com>

	* include/math.h: Remove __isinf_ns, __isinf_nsf, __isinf_nsl.
	* math/Makefile: Remove isinf_ns.c.
	* math/divtc3.c (__divtc3): Replace __isinf_nsl with isinf.
	* math/multc3.c (__multc3): Likewise.
	* math/s_casin.c (__casin): Likewise.
	* math/s_casinf.c (__casinf): Likewise.
	* math/s_casinl.c (__casinl): Likewise.
	* math/s_cproj.c (__cproj): Likewise.
	* math/s_cprojf.c (__cprojf): Likewise.
	* math/s_cprojl.c (__cprofl): Likewise.
	* math/s_ctan.c (__ctan): Likewise.
	* math/s_ctanf.c (__ctanf): Likewise.
	* math/s_ctanh.c (__ctanh): Likewise.
	* math/s_ctanhf.c (__ctanhf): Likewise.
	* math/s_ctanhl.c (__ctanhl): Likewise.
	* math/s_ctanl.c (__ctanl): Likewise.
	* math/w_fmod.c (__fmod): Likewise.
	* math/w_fmodf.c (__fmodf): Likewise.
	* math/w_fmodl.c (_fmodl): Likewise.
	* math/w_remainder.c (__remainder): Likewise.
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