devel/py-grpcio: drop unused patch after r473596

PR:		223019

devel/py-grpcio/files/patch-third__party_boringssl_crypto_cpu-aarch64-linux.c

@@ -1,45 +0,0 @@
---- third_party/boringssl/crypto/cpu-aarch64-linux.c.orig	2018-01-02 23:09:20 UTC
-+++ third_party/boringssl/crypto/cpu-aarch64-linux.c
-@@ -16,7 +16,42 @@
- 
- #if defined(OPENSSL_AARCH64) && !defined(OPENSSL_STATIC_ARMCAP)
- 
-+#if __has_include(<sys/auxv.h>)
- #include <sys/auxv.h>
-+#elif defined(__FreeBSD__)
-+#include <sys/param.h>
-+#include <sys/sysctl.h>
-+#include <elf.h>
-+#include <errno.h>
-+#include <unistd.h>
-+
-+#ifndef AT_HWCAP
-+#define AT_HWCAP                25
-+#endif
-+
-+static unsigned long getauxval(unsigned long type) {
-+  Elf_Auxinfo auxv[AT_COUNT];
-+  size_t len = sizeof(auxv);
-+  int mib[] = {
-+    CTL_KERN,
-+    KERN_PROC,
-+    KERN_PROC_AUXV,
-+    getpid(),
-+  };
-+
-+  if (sysctl(mib, nitems(mib), auxv, &len, NULL, 0) != -1) {
-+    for (size_t i = 0; i < nitems(auxv); i++)
-+      if ((unsigned long)auxv[i].a_type == type)
-+        return auxv[i].a_un.a_val;
-+
-+    errno = ENOENT;
-+  }
-+  return 0;
-+}
-+#else
-+#define AT_HWCAP                16
-+#define getauxval(x)            0
-+#endif /* <sys/auxv.h> */
- 
- #include <openssl/arm_arch.h>
-