message: [Initialization] Remove extra ClangASTContext init
  This is also being initialized in SystemInitializerFull (which is the right
  place to do it).
diff: #include "lldb/Host/FileSystem.h"
  #include "lldb/Host/Host.h"
  #include "lldb/Host/HostInfo.h"
  -#include "lldb/Symbol/ClangASTContext.h"
  #include "lldb/Utility/Log.h"
  #include "lldb/Utility/Reproducer.h"
  #include "lldb/Utility/Timer.h"
  @@ -97,8 +96,6 @@ llvm::Error SystemInitializerCommon::Initialize() {
  process_gdb_remote::ProcessGDBRemoteLog::Initialize();
  // Initialize plug-ins
  - ClangASTContext::Initialize();
  -
  ObjectContainerBSDArchive::Initialize();
  EmulateInstructionARM::Initialize();
  @@ -125,7 +122,6 @@ void SystemInitializerCommon::Terminate() {
  Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
  ObjectContainerBSDArchive::Terminate();
  - ClangASTContext::Terminate();
  EmulateInstructionARM::Terminate();
  EmulateInstructionMIPS::Terminate();
  