psmisc: remove musl patch

It doesn't apply for musl either (any longer).

Signed-off-by: Jürgen Buchmüller <pullmoll@t-online.de>

srcpkgs/psmisc/patches/musl_ptregs.patch

@@ -1,24 +0,0 @@
-Author: Breno Leitao <brenohl@br.ibm.com>
-Date:   Thu Apr 6 14:03:00 2017 -0300
-
-    peekfd: Avoid pt_regs clash
-
-Index: psmisc-22.21/src/peekfd.c
-===================================================================
---- src/peekfd.c.old
-+++ src/peekfd.c
-@@ -27,7 +27,13 @@
- #include <sys/types.h>
- #include <sys/wait.h>
- #include <sys/syscall.h>
-+#if !defined(__GLIBC__)
-+#define pt_regs uapi_pt_regs
-+#endif
- #include <asm/ptrace.h>
-+#if !defined(__GLIBC__)
-+#undef pt_regs
-+#endif
- #include <byteswap.h>
- #include <endian.h>
- #include <sys/user.h>
-