mtd: mchp23k256: drop unneeded MODULE_ALIAS

The ID table already has respective entry and MODULE_DEVICE_TABLE and
creates proper alias for SPI driver.  Having another MODULE_ALIAS causes
the alias to be duplicated.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20240414154943.127079-1-krzk@kernel.org

drivers/mtd/devices/mchp23k256.c

@@ -257,4 +257,3 @@ module_spi_driver(mchp23k256_driver);
 MODULE_DESCRIPTION("MTD SPI driver for MCHP23K256 RAM chips");
 MODULE_AUTHOR("Andrew Lunn <andre@lunn.ch>");
 MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("spi:mchp23k256");