Remove unused lottie2ffmpeg script

mautrix_telegram/util/lottie2ffmpeg

@@ -1,24 +0,0 @@
-#!/bin/bash
-TMPDIR=$(mktemp -d)
-
-if [ ! -e $TMPDIR ]; then
-    >&2 echo "Failed to create temp directory"
-    exit 1
-fi
-
-trap "exit 1"           HUP INT PIPE QUIT TERM
-trap 'rm -rf "$TMPDIR"' EXIT
-
-cd $TMPDIR
-
-lottieconverter=$1
-resolution=$2
-
-cat > input
-
-for i in {0..99}; do
-	padded="0$i"
-	$lottieconverter input frame-${padded: -2}.png png $resolution $((i+1))
-done
-
-ffmpeg -start_number 0 -framerate 30 -i frame-%02d.png -c:v libvpx-vp9 -pix_fmt yuva420p out.webm -f webm -