Update src/env.h

Author: Benjamin E. Coe

src/env.h

@@ -1260,7 +1260,6 @@ class Environment : public MemoryRetainer {
   bool emit_env_nonstring_warning_ = true;
   bool emit_err_name_warning_ = true;
   bool emit_filehandle_warning_ = true;
-  bool emit_insecure_umask_warning_ = true;
   bool source_maps_enabled_ = false;
 
   size_t async_callback_scope_depth_ = 0;