packages/ffgun: drop

hacksaw is nolonger maintained, we need to adapt the shell script

nix/packages/by-name/ffgun/package.nix

@@ -1,40 +0,0 @@
-# adapted from https://github.com/neXromancers/hacksaw
-{
-  writeShellApplication,
-  shotgun,
-  ffmpeg_4-full,
-}:
-writeShellApplication {
-  name = "ffgun";
-  runtimeInputs = [
-    shotgun
-    ffmpeg_4-full
-  ];
-  text = ''
-    dir=/tmp
-    current=$(date +%F_%H-%M-%S)
-
-    echo "$dir/$current.mp4"
-
-    hacksaw -n | {
-        IFS=+x read -r w h x y
-
-        w=$((w + w % 2))
-        h=$((h + h % 2))
-
-        ffmpeg               \
-            -v 16            \
-            -r 30            \
-            -f x11grab       \
-            -s "''${w}x''${h}"   \
-            -i ":0.0+$x,$y"  \
-            -preset slow     \
-            -c:v h264        \
-            -pix_fmt yuv420p \
-            -crf 20          \
-            "$dir/$current.mp4"
-    }
-  '';
-
-  meta.description = "Shotgun's integration script with ffmpeg from their github";
-}