board/xilinx: remove xilinx_2026.1/linux.hash

Now that all Xilinx boards have been bumped to Linux 6.18.40, remove the hash
for the xlnx_rebase_v6.18_LTS_2026.1 release tag.

Signed-off-by: Neal Frager <neal.frager@amd.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

board/xilinx/xilinx_v2026.1/patches/linux-headers/linux-headers.hash

diff --git a/board/xilinx/xilinx_v2026.1/patches/linux-headers/linux-headers.hash b/board/xilinx/xilinx_v2026.1/patches/linux-headers/linux-headers.hash
deleted file mode 120000
index 5808d92..0000000
--- a/board/xilinx/xilinx_v2026.1/patches/linux-headers/linux-headers.hash
+++ /dev/null
@@ -1 +0,0 @@
-../linux/linux.hash
\ No newline at end of file

board/xilinx/xilinx_v2026.1/patches/linux/linux.hash

diff --git a/board/xilinx/xilinx_v2026.1/patches/linux/linux.hash b/board/xilinx/xilinx_v2026.1/patches/linux/linux.hash
deleted file mode 100644
index 6bfa4d2..0000000
--- a/board/xilinx/xilinx_v2026.1/patches/linux/linux.hash
+++ /dev/null
@@ -1,7 +0,0 @@
-# Locally calculated
-sha256  23c9cf18f5f419dfaafe5c3d3eda4812eb71bf1f2fbf3b35470478bbaa3d96bb  xlnx_rebase_v6.18_LTS_2026.1.tar.gz
-
-# Locally calculated
-sha256  fb5a425bd3b3cd6071a3a9aff9909a859e7c1158d54d32e07658398cd67eb6a0  COPYING
-sha256  8780e78a1a737e127f25a65f6d95269bffd36158dc261114de7859b490bfc5aa  LICENSES/preferred/GPL-2.0
-sha256  8e378ab93586eb55135d3bc119cce787f7324f48394777d00c34fa3d0be3303f  LICENSES/exceptions/Linux-syscall-note