Revert "ART: additional info SIGILL"

This reverts commit 0cff0b0956145a192865bef4896c771e164d0a3a.

Reason for revert: insufficient coverage for intended purpose per follow-up
discussion on initial CL.

Bug: 65312375
Test: m -j32
Change-Id: I3cf94207ddd93d6030d80f681613e2a7e8b2fd66
diff --git a/runtime/runtime_common.cc b/runtime/runtime_common.cc
index f8e9442..940e461 100644
--- a/runtime/runtime_common.cc
+++ b/runtime/runtime_common.cc
@@ -416,19 +416,8 @@
            << "Cmdline: " << cmd_line << std::endl
            << "Thread: " << tid << " \"" << thread_name << "\"" << std::endl
            << "Registers:\n" << Dumpable<UContext>(thread_context) << std::endl
-           << "Backtrace:\n" << Dumpable<Backtrace>(thread_backtrace);
-    if (signal_number == SIGILL) {
-      // Note the view we present is from the d-cache, which should
-      // match the i-cache if all is well.
-      static const size_t kCodeSnippetBytes = 16;
-      stream << "Code:\n\t" << info->si_addr << ":";
-      uintptr_t start = reinterpret_cast<uintptr_t>(info->si_addr);
-      uintptr_t end = std::min(start + kCodeSnippetBytes, RoundUp(start, kPageSize));
-      for (uintptr_t addr = start; addr != end; ++addr) {
-        stream << StringPrintf(" %02x", *(reinterpret_cast<const uint8_t*>(addr)));
-      }
-    }
-    stream << std::endl << std::flush;
+           << "Backtrace:\n" << Dumpable<Backtrace>(thread_backtrace) << std::endl;
+    stream << std::flush;
   };
 
   if (dump_on_stderr) {
diff --git a/runtime/runtime_common.h b/runtime/runtime_common.h
index 1248fe0..06d6627 100644
--- a/runtime/runtime_common.h
+++ b/runtime/runtime_common.h
@@ -30,7 +30,6 @@
 
 #include <iomanip>
 
-#include "base/bit_utils.h"
 #include "base/dumpable.h"
 #include "native_stack_dump.h"
 #include "utils.h"