mb/system76/lemp10: Remove incorrect SPD address 0x50

The Lemur Pro, with its mixed memory topology, only has a DIMM at
address 0x52.

Change-Id: Iecea8c70c7fd40943d86f8918f8e3b384538b5c3
Fixes: 4dcee4f21d ("mb/system76/lemp10: Add System76 Lemur Pro 10")
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60779
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jeremy Soller <jeremy@system76.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>

src/mainboard/system76/lemp10/romstage.c

@@ -13,7 +13,6 @@ void mainboard_memory_init_params(FSPM_UPD *mupd)
 		.topo = MEM_TOPO_MIXED,
 		.cbfs_index = 0,
 		.smbus = {
-			[0] = { .addr_dimm[0] = 0x50, },
 			[1] = { .addr_dimm[0] = 0x52, },
 		},
 	};