Merge pull request #1039 from saper/unused_ctx_w

Remove unused ctx_w

src/binding.cpp

@@ -10,7 +10,6 @@ Sass_Import_List sass_importer(const char* cur_path, Sass_Importer_Entry cb, str
   void* cookie = sass_importer_get_cookie(cb);
   struct Sass_Import* previous = sass_compiler_get_last_import(comp);
   const char* prev_path = sass_import_get_path(previous);
-  sass_context_wrapper* ctx_w = static_cast<sass_context_wrapper*>(cookie);
   CustomImporterBridge& bridge = *(static_cast<CustomImporterBridge*>(cookie));
 
   std::vector<void*> argv;