util/lint: Fix some mistakes in spelling.txt

Somehow two words slipped in here where the "bad" and "good" spellings
are the same, which doesn't make sense. Remove them.

Change-Id: I9b53ce8538616c164efb4eb25ff859975ddadfd2
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78822
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
diff --git a/util/lint/spelling.txt b/util/lint/spelling.txt
index 8f515d8..25605ef 100644
--- a/util/lint/spelling.txt
+++ b/util/lint/spelling.txt
@@ -4136,7 +4136,6 @@
 frontent||frontend
 frops||drops
 frop||drop
-ftbs||ftbs
 fualts||faults
 fualt||fault
 fucntions||functions
@@ -7362,7 +7361,6 @@
 readabilty||readability
 readapted||re-adapted
 readiable||readable
-readme||readme
 realeased||released
 realeases||releases
 realease||release