remove unused directory

Author: Steve Johnson

gen/.gitignore

@@ -5,7 +5,7 @@
 			"follow_symlinks": true,
 			"path": ".",
       "folder_exclude_patterns": [
-        ".sass-cache", "gen", "lib", "demo/js", "demo/css",
+        ".sass-cache", "lib", "demo/js", "demo/css",
         "literallycanvas", "node_modules"
       ],
       "file_exclude_patterns": [