Revert of Reland: Introduce sys_sigprocmask and sys_sigaction.

sandbox/linux/services/syscall_wrappers_unittest.cc

Index: sandbox/linux/services/syscall_wrappers_unittest.cc
diff --git a/sandbox/linux/services/syscall_wrappers_unittest.cc b/sandbox/linux/services/syscall_wrappers_unittest.cc
index 1878ff3fe792afb9d5a83b0d7a9558c2ae56080a..6a70beb673bcefe62b0bdd2bb98d741b5b7e4c54 100644
--- a/sandbox/linux/services/syscall_wrappers_unittest.cc
+++ b/sandbox/linux/services/syscall_wrappers_unittest.cc
@@ -8,13 +8,11 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <unistd.h>
-#include <cstring>
 
 #include "base/logging.h"
 #include "base/posix/eintr_wrapper.h"
 #include "base/third_party/valgrind/valgrind.h"
 #include "build/build_config.h"
-#include "sandbox/linux/system_headers/linux_signal.h"
 #include "sandbox/linux/tests/test_utils.h"
 #include "sandbox/linux/tests/unit_tests.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -82,18 +80,6 @@
   EXPECT_EQ(sgid, sys_sgid);
 }
 
-TEST(SyscallWrappers, LinuxSigSet) {
-  sigset_t sigset;
-  ASSERT_EQ(0, sigemptyset(&sigset));
-  ASSERT_EQ(0, sigaddset(&sigset, LINUX_SIGSEGV));
-  ASSERT_EQ(0, sigaddset(&sigset, LINUX_SIGBUS));
-  uint64_t linux_sigset = 0;
-  std::memcpy(&linux_sigset, &sigset,
-              std::min(sizeof(sigset), sizeof(linux_sigset)));
-  EXPECT_EQ((1ULL << (LINUX_SIGSEGV - 1)) | (1ULL << (LINUX_SIGBUS - 1)),
-            linux_sigset);
-}
-
 }  // namespace
 
 }  // namespace sandbox