fixed build error

map_selection.lua.sample

@@ -1,32 +0,0 @@
-return require 'map_gen.maps.default'
---[[
-    Replace the word default in the quotes above with the name of the map you want to play then save this file.
-    Example: If you want to play beach, line 1 should look like:
-    return require 'map_gen.maps.beach'
-    If default is left in place, you will get a vanilla world.
-
-    You can get the full list of maps by looking in map_gen/maps/
-    Names of some popular maps:
-    diggy
-    crash_site
-    beach
-    connected_dots
-    crosses
-    danger_ores
-    diagonal_ribbon
-    double_beach
-    fractal_balls
-    fruit_loops
-    grid_islands
-    grid_islands_rotated
-    line_and_tree
-    line_and_trees
-    lines_and_balls
-    lines_and_squares
-    maltease_crossings
-    rotten_apples
-    spiral_of_spirals
-    tetris
-    triangle_of_death
-    void_gears
-]]