fix(handoff): remove XFERLIST_TB_FW_CONFIG

Remove XFERLIST_TB_FW_CONFIG as the corresponding patch to add it to the
specification [1] has been abandoned and there are no plans for it to be
merged, with the information it contains being moved to a transfer list
instead.

[1] https://github.com/FirmwareHandoff/firmware_handoff/pull/37

Change-Id: If4a21d56b87bafc2f4894beefd73ac51e36e6571
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
diff --git a/include/lib/transfer_list.h b/include/lib/transfer_list.h
index 7a38e70..7b66a5e 100644
--- a/include/lib/transfer_list.h
+++ b/include/lib/transfer_list.h
@@ -59,7 +59,6 @@
 	TL_TAG_OPTEE_PAGABLE_PART = 0x100,
 	TL_TAG_DT_SPMC_MANIFEST = 0x101,
 	TL_TAG_EXEC_EP_INFO64 = 0x102,
-	TL_TAG_TB_FW_CONFIG = 0x103,
 	TL_TAG_SRAM_LAYOUT64 = 0x104,
 	TL_TAG_MBEDTLS_HEAP_INFO = 0x105,
 };