Disable 2D MSAA in Dynamic TileMap Layers to avoid warning on start (#1030)

The demo uses the Compatibility rendering method, which currently
doesn't support 2D MSAA.

2d/dynamic_tilemap_layers/project.godot

@@ -64,4 +64,3 @@ common/physics_ticks_per_second=120
 renderer/rendering_method="gl_compatibility"
 renderer/rendering_method.mobile="gl_compatibility"
 environment/defaults/default_clear_color=Color(0.156863, 0.133333, 0.25098, 1)
-anti_aliasing/quality/msaa_2d=2