Revert "objtool: Increase per-function WARN_FUNC() rate limit"

Revert "objtool: Increase per-function WARN_FUNC() rate limit"

This reverts commit 0a7fb6f07e3ad497d31ae9a2082d2cacab43d54a.

The "skipping duplicate warnings" warning is technically not an actual
warning, which can cause confusion.  This feature isn't all that useful
anyway.  It's exceedingly rare for a function to have more than one
unrelated warning.

Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/e5abe5e858acf1a9207a5dfa0f37d17ac9dca872.1743481539.git.jpoimboe@kernel.org