[mobs_mc] Remove `goto` from enderman.lua

mods/ENTITIES/mobs_mc/enderman.lua

@@ -346,8 +346,7 @@ mobs:register_mob("mobs_mc:enderman", {
 					--skip player if they have no data - log it
 					if not player_eye_height then
 						minetest.log("error", "Enderman at location: ".. dump(enderpos).." has indexed a null player!")
-						goto continue
-					end
+					else
 
 						--calculate very quickly the exact location the player is looking
 						--within the distance between the two "heads" (player and enderman)
@@ -368,7 +367,7 @@ mobs:register_mob("mobs_mc:enderman", {
 							end						
 						end
 
-					::continue:: -- this is a sweep over statement, this can be used to continue even when errors occurred
+					end
 				end
 			end
 		end