sanitizer_common: remove noisy warning about symbolizer not found.

[krasin]

Summary

In r251553, I added a warning that proved to be super noisy,
especially in case of MSan. Removing it for now, and I will
probably add some additional diagnostics for symbolizer, when
I better understand how to make it properly.

[eugenis]

lib/sanitizer_common/sanitizer_symbolizer.h

147

this is not present in HEAD
please rebase the change

147

no wait, you are adding a line.
but why?

[krasin]

remove accidental change

lib/sanitizer_common/sanitizer_symbolizer.h

147

it's a leftover from my attempt to only print the warning at the first time it tries to symbolize.
Removed.

lib/sanitizer_common/sanitizer_symbolizer.h

private:
 
   bool FindModuleNameAndOffsetForAddress(uptr address, const char **module_name,
                                          uptr *module_offset);
   LoadedModule *FindModuleForAddress(uptr address);
   LoadedModule modules_[kMaxNumberOfModules];
   uptr n_modules_;
   // If stale, need to reload the modules before looking up addresses.
   bool modules_fresh_;
+  bool has_warned_about_missing_symbolizer_;
 
   // Platform-specific default demangler, must not return nullptr.
   const char *PlatformDemangle(const char *name);
   void PlatformPrepareForSandboxing();
 
   static Symbolizer *symbolizer_;
   static StaticSpinMutex init_mu_;
 

lib/sanitizer_common/sanitizer_symbolizer_posix_libcdep.cc

static void ChooseSymbolizerTools(IntrusiveList<SymbolizerTool> *list,
   if (SymbolizerTool *tool = ChooseExternalSymbolizer(allocator)) {
     list->push_back(tool);
   }
 
 #if SANITIZER_MAC
   VReport(2, "Using dladdr symbolizer.\n");
   list->push_back(new(*allocator) DlAddrSymbolizer());
 #endif  // SANITIZER_MAC
-
-  if (list->size() == 0) {
-    Report("WARNING: no internal or external symbolizer found.\n");
-  }
 }
 
 Symbolizer *Symbolizer::PlatformInit() {
   IntrusiveList<SymbolizerTool> list;
   list.clear();
   ChooseSymbolizerTools(&list, &symbolizer_allocator_);
   return new(symbolizer_allocator_) Symbolizer(list);
 }
 
 }  // namespace __sanitizer
 
 #endif  // SANITIZER_POSIX