board/zynq/patches: remove xilinx 6.1.70 hashes

Now that the zynq_* defconfigs have migrated to xilinx_2024.1, remove the
older hashes.

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

board/zynq/patches/linux/linux.hash

@@ -1,3 +1,2 @@
 # Locally calculated
-sha256  56acddefc6f6fdc00df5b75ceb4f86a9d0af9a4fef78cf57f9f2c274b22f006f  xlnx_rebase_v6.1_LTS_merge_6.1.70.tar.gz
 sha256  ea85988e66b9a2e19ccd76d0f5f5e657988a873fed292160917712f45605a805  xlnx_rebase_v6.6_LTS_2024.1.tar.gz

board/zynq/patches/uboot/uboot.hash

@@ -1,3 +1,2 @@
 # Locally calculated
-sha256  32a997a748697ff27e5e6db8edaff5ba893077214bc18b5267daff0b708dab53  xlnx_rebase_v2023.01_2023.2.tar.gz
 sha256  58e391a001d9d8ed347ab3258ff7c8435c866b1ff2b2c22ebc95af592444c0f5  xlnx_rebase_v2024.01_2024.1.tar.gz