maint: remove unused files

pywebio/html/css/mditor.min.css.map

@@ -1 +0,0 @@
-{"version":3,"sources":[],"names":[],"mappings":"","file":"css/mditor.min.css","sourceRoot":""}

setup.py

@@ -47,14 +47,12 @@ setup(
             "html/css/bootstrap.min.css",
             "html/css/mditor.min.css",
             "html/css/jquery.toast.min.css",
-            "html/css/mditor.min.css.map",
             "html/css/app.css",
             "html/css/codemirror.min.css",
             "html/js/FileSaver.min.js",
             "html/js/mditor.min.js",
             "html/js/codemirror.js",
             "html/js/pywebio.min.js",
-            "html/js/pywebio.min.map",
             "html/js/mustache.min.js",
             "html/js/jquery.min.js",
             "html/js/bootstrap.min.js",
@@ -65,7 +63,6 @@ setup(
             "html/js/codemirror.min.js",
             "html/image/favicon_open_16.png",
             "html/image/favicon_closed_32.png",
-            "html/index_cdn.html",
             "html/index.html",
         ],
     },