If you don’t mind losing the thin vertical bar on the left-hand side (near the hamburger) when the menu is collapsed, you can do it like this:
<style>
.active\:opacity-100.shrink-0 {
display: none !important;
}
.active\:opacity-100.flex .h-6 {
display: none !important;
}
.select-none.font-semibold {
display: none !important;
}
.h-\[32px\].w-\[1px\] {
display: none !important;
}
</style>