samples: smbus: Remove qemu_x86_64 overlay

Remove overlay added by mistake. SMBus EEPROM PR is not merged and the
dts would be updated for qemu_x86_64 board's dts.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>

samples/drivers/smbus/qemu_x86_64.overlay

@@ -1,17 +0,0 @@
-/*
- * Copyright (c) 2022 Intel Corporation
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
-#include <zephyr/dt-bindings/pcie/pcie.h>
-
-&smbus0 {
-	eeprom2: smbus_eeprom@50 {
-		compatible = "jedec,smbus-eeprom";
-		reg = <0x50>;
-		size = <0x100>;
-
-		status = "okay";
-	};
-};