octoprint: remove sarge override

Upstream wants 0.1.5post0

pkgs/applications/misc/octoprint/default.nix

@@ -15,7 +15,6 @@ let
     packageOverrides = lib.foldr lib.composeExtensions (self: super: { }) ([
       (mkOverride "flask"       "0.10.1" "0wrkavjdjndknhp8ya8j850jq7a1cli4g5a93mg8nh1xz2gq50sc")
       (mkOverride "flask_login" "0.2.11" "1rg3rsjs1gwi2pw6vr9jmhaqm9b3vc9c4hfcsvp4y8agbh7g3mc3")
-      (mkOverride "sarge"       "0.1.4"  "08s8896973bz1gg0pkr592w6g4p6v47bkfvws5i91p9xf8b35yar")
       (mkOverride "tornado"     "4.5.3"  "02jzd23l4r6fswmwxaica9ldlyc2p6q8dk6dyff7j58fmdzf853d")
 
       # Octoprint holds back jinja2 to 2.8.1 due to breaking changes.