Nuke several globals; some were unused, others moved to universe

src/pcedit/pc.action.cpp

@@ -18,7 +18,6 @@ extern cUniverse univ;
 extern sf::RenderWindow mainPtr;
 extern fs::path file_in_mem;
 extern sf::Texture pc_gworld;
-extern bool diff_depth_ok;
 
 short which_pc_displayed,store_pc_trait_mode,store_which_to_edit;
 extern short current_active_pc;

src/pcedit/pc.editors.cpp

@@ -40,7 +40,7 @@ extern sf::RenderWindow mainPtr;
 extern rectangle d_rects[80];
 extern short d_rect_index[80];
 
-extern bool diff_depth_ok,current_file_has_maps;
+extern bool current_file_has_maps;
 bool choice_active[6];
 
 extern short which_pc_displayed;

src/pcedit/pc.main.cpp

@@ -42,7 +42,7 @@ std::string scenario_temp_dir_name = "pc_scenario";
 short current_active_pc = 0;
 
 /* Mac stuff globals */
-bool All_Done = false,diff_depth_ok = false;
+bool All_Done = false;
 sf::Event event;
 sf::RenderWindow mainPtr;
 bool gInBackground = false;