Revert "Implement getifaddrs(3)/freeifaddrs(3)."

Werror build broken. Revert while working on a fix.

This reverts commit 0945ed5cc5.

Change-Id: I67edab7a7a3b9aa673ce9d14aa95380f947838a1

tests/Android.mk

@@ -61,7 +61,6 @@ libBionicStandardTests_src_files := \
     ftw_test.cpp \
     getauxval_test.cpp \
     getcwd_test.cpp \
-    ifaddrs_test.cpp \
     inttypes_test.cpp \
     libc_logging_test.cpp \
     libgen_basename_test.cpp \

tests/ifaddrs_test.cpp

@@ -1,38 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <gtest/gtest.h>
-
-#include <ifaddrs.h>
-
-TEST(ifaddrs, freeifaddrs_null) {
-  freeifaddrs(nullptr);
-}
-
-TEST(ifaddrs, getifaddrs_smoke) {
-  ifaddrs* addrs = nullptr;
-
-  ASSERT_EQ(0, getifaddrs(&addrs));
-  ASSERT_TRUE(addrs != nullptr);
-
-  bool saw_loopback = false;
-  for (ifaddrs* addr = addrs; addr != nullptr; addr = addr->ifa_next) {
-    if (addr->ifa_name && strcmp(addr->ifa_name, "lo") == 0) saw_loopback = true;
-  }
-  ASSERT_TRUE(saw_loopback);
-
-  freeifaddrs(addrs);
-}