mb/adlink: Remove leftover directory

These boards are clones of LiPPERT boards, which are no longer in this
branch (they were AMD AGESA boards). So, drop the ADLINK placeholders.

Change-Id: Idfd77daf4a5b3d1e120ed22f9a48fa1bf884de9e
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82218
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/mainboard/adlink/CM2-GF/board_info.txt

@@ -1,8 +0,0 @@
-Category: half
-Board name: CoreModule2-GF
-Board URL: http://www.adlinktech.com/PD/web/PD_detail.php?pid=1277
-ROM package: SOIC8
-ROM protocol: SPI
-ROM socketed: n
-Flashrom support: y
-Clone of: lippert/frontrunner-af

src/mainboard/adlink/Kconfig

@@ -1,11 +0,0 @@
-## SPDX-License-Identifier: GPL-2.0-only
-
-if VENDOR_ADLINK
-
-comment "see under vendor LiPPERT"
-# any further boards will then be ADLINK
-
-config MAINBOARD_VENDOR
-	default "ADLINK"
-
-endif # VENDOR_ADLINK

src/mainboard/adlink/Kconfig.name

@@ -1,4 +0,0 @@
-## SPDX-License-Identifier: GPL-2.0-only
-
-config VENDOR_ADLINK
-	bool "ADLINK"

src/mainboard/adlink/cExpress-GFR/board_info.txt

@@ -1,8 +0,0 @@
-Category: half
-Board name: cExpress-GFR
-Board URL: http://www.adlinktech.com/PD/web/PD_detail.php?pid=1132
-ROM package: SOIC8
-ROM protocol: SPI
-ROM socketed: n
-Flashrom support: y
-Clone of: lippert/toucan-af