Revert "ART: dex2oat flag for HGraphVisualizer dump file"

Breaks compilation of tests.

This reverts commit 54953dfdcb3bb8896d8af2d20adef84fb740ce77.

Change-Id: I868b876c3130be61f1169c5fccdffc0368bee11e
diff --git a/compiler/driver/compiler_driver.cc b/compiler/driver/compiler_driver.cc
index e371807..9985d66 100644
--- a/compiler/driver/compiler_driver.cc
+++ b/compiler/driver/compiler_driver.cc
@@ -339,8 +339,7 @@
                                const InstructionSetFeatures* instruction_set_features,
                                bool image, std::set<std::string>* image_classes,
                                std::set<std::string>* compiled_classes, size_t thread_count,
-                               bool dump_stats, bool dump_passes,
-                               const std::string& dump_cfg_file_name, CumulativeLogger* timer,
+                               bool dump_stats, bool dump_passes, CumulativeLogger* timer,
                                int swap_fd, const std::string& profile_file)
     : swap_space_(swap_fd == -1 ? nullptr : new SwapSpace(swap_fd, 10 * MB)),
       swap_space_allocator_(new SwapAllocator<void>(swap_space_.get())),
@@ -362,7 +361,6 @@
       stats_(new AOTCompilationStats),
       dump_stats_(dump_stats),
       dump_passes_(dump_passes),
-      dump_cfg_file_name_(dump_cfg_file_name),
       timings_logger_(timer),
       compiler_context_(nullptr),
       support_boot_image_fixup_(instruction_set != kMips),