Remove flux dependency (#10313)

package.json

@@ -80,7 +80,6 @@
         "escape-html": "^1.0.3",
         "file-saver": "^2.0.5",
         "filesize": "10.0.6",
-        "flux": "4.0.3",
         "focus-visible": "^5.2.0",
         "gfm.css": "^1.1.2",
         "glob-to-regexp": "^0.4.1",
@@ -153,7 +152,6 @@
         "@types/diff-match-patch": "^1.0.32",
         "@types/escape-html": "^1.0.1",
         "@types/file-saver": "^2.0.3",
-        "@types/flux": "^3.1.9",
         "@types/fs-extra": "^11.0.0",
         "@types/geojson": "^7946.0.8",
         "@types/glob-to-regexp": "^0.4.1",