fix: pos payment methods not setting rounded_total

[sunhoww]

The deleted code block is a duplicate of

erpnext/erpnext/selling/page/point_of_sale/pos_payment.js

Lines 246 to 254 in fb8c917

	auto_set_remaining_amount() {
	const doc = this.events.get_frm().doc;
	const grand_total = cint(frappe.sys_defaults.disable_rounded_total) ? doc.grand_total : doc.rounded_total;
	const remaining_amount = grand_total - doc.paid_amount;
	const current_value = this.selected_mode ? this.selected_mode.get_value() : undefined;
	if (!current_value && remaining_amount > 0 && this.selected_mode) {
	this.selected_mode.set_value(remaining_amount);
	}
	}

This block contains changes from #24738 that already fixes the mentioned issue. Therefore, as the removed block was defined below this block, its existence was making the changes in the previous PR have no effect.

[sunhoww]

Found more duplicate code.

[ChillarAnand]

@sunhoww Did you use any tool to find the duplicate code or did you stumble on it accidentally?

[sunhoww]

I stumbled upon it while investigating the OP issue.