Fix 2fd871e2af: load correct ending-year for old (pre 0.7) savegames

Despite what it looked like, you could never really change the
ending-year (it was always reset to 2050 on start-up). See commit
683b65ee1 for details. As a side-effect, the variable that was
suppose to store the ending-year was just zero, never containing
a real ending-year.

src/saveload/afterload.cpp

@@ -755,12 +755,7 @@ bool AfterLoadGame()
 		_settings_game.linkgraph.distribution_default = DT_MANUAL;
 	}
 
-	if (IsSavegameVersionBefore(SLV_105)) {
-		extern int32 _old_ending_year_slv_105; // in date.cpp
-		_settings_game.game_creation.ending_year = _old_ending_year_slv_105 - 1;
-	} else if (IsSavegameVersionBefore(SLV_ENDING_YEAR)) {
-		/* Ending year was a GUI setting before SLV_105, was removed in revision 683b65ee1 (svn r14755). */
-		/* This also converts scenarios, both when loading them into the editor, and when starting a new game. */
+	if (IsSavegameVersionBefore(SLV_ENDING_YEAR)) {
 		_settings_game.game_creation.ending_year = DEF_END_YEAR;
 	}