FIX: move shfmt to project root

lib/shellfmt/launch_shellfmt.sh

@@ -1,23 +0,0 @@
-#!/bin/bash
-# run-shellcheck
-
-if [ ! -f tmp/shfmt ]; then
-    wget -O tmp/shfmt https://github.com/mvdan/sh/releases/download/v3.2.0/shfmt_v3.2.0_linux_amd64
-fi
-
-chmod +x tmp/shfmt
-
-files=""
-retval=0
-
-if [ "$#" -eq 0 ]; then
-    files=$(find . -name "*.sh" | sort -V)
-else
-    files="$*"
-fi
-
-for f in $files; do
-    ./tmp/shfmt -l -i 4 -w "$f"
-done
-
-exit "$retval"