Undo a local change

Summary: I had committed a change by mistake. Reverting it.

Test Plan: build it.

Reviewed By: lakshmiganesh@fb.com

Subscribers: njormrod, folly-diffs@

FB internal diff: D1652341

Signature: t1:1652341:1414779013:9f363acba95fbac1988200081659edf71ac63eec

folly/SocketAddress.cpp

@@ -29,9 +29,6 @@
 #include <errno.h>
 #include <sstream>
 #include <string>
-#include <execinfo.h>
-#include <stdio.h>
-#include <stdlib.h>
 
 namespace {
 
@@ -546,14 +543,6 @@ size_t SocketAddress::hash() const {
       break;
     case AF_UNSPEC:
     default:
-      void *array[20];
-      size_t size;
-      // get void*'s for all entries on the stack
-      size = backtrace(array, 20);
-      // print out all the frames to stderr
-      fprintf(stderr, "Exception: \n");
-      backtrace_symbols_fd(array, size, STDERR_FILENO);
-      LOG(FATAL) << "Invalid ip address: " << describe();
       throw std::invalid_argument(
         "SocketAddress: unsupported address family "
         "for hashing");