Don't #include "internal.h" twice.

Change-Id: If28138bbda4111b4a62f48cd30c7a71a675e44f7
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/50885
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>

crypto/cpu_aarch64_apple.c

diff --git a/crypto/cpu_aarch64_apple.c b/crypto/cpu_aarch64_apple.c
index 55c20f8..6699ff7 100644
--- a/crypto/cpu_aarch64_apple.c
+++ b/crypto/cpu_aarch64_apple.c
@@ -22,8 +22,6 @@
 
 #include <openssl/arm_arch.h>
 
-#include "internal.h"
-
 
 extern uint32_t OPENSSL_armcap_P;