Strip bootstrap.sh from tfw.sh as Dockerization efforts are abandoned

hack/libhack/common.sh

@@ -5,19 +5,3 @@ pushd() {
 popd() {
     command popd "$@" > /dev/null
 }
-
-spinned() {
-    "$@" &
-    pid=$!
-    spin=("-" "\\" "|" "/")
-
-    echo -n "${spin[0]}"
-    while kill -0 $pid &> /dev/null; do
-        for i in "${spin[@]}"; do
-            echo -ne "\b$i"
-            sleep 0.1
-        done
-    done
-    echo -ne "\b"
-    wait $pid
-}