Revert "emacs: use --exclude=false when checking for empty searches"

Revert commit 8370e3cfe2, and remark the
corresponding test as broken. Also update the expected output of the
broken test to show excludes active in the user defined saved searches.

emacs/notmuch-hello.el

@@ -570,7 +570,7 @@ options will be handled as specified for
 					    (plist-get options :filter))))
 	 "\n")))
     (unless (= (notmuch--call-process-region (point-min) (point-max) notmuch-command
-					     t t nil "count" "--exclude=false" "--batch") 0)
+				    t t nil "count" "--batch") 0)
       (notmuch-logged-error
        "notmuch count --batch failed"
        "Please check that the notmuch CLI is new enough to support `count

test/T440-emacs-hello.sh

@@ -69,6 +69,7 @@ notmuch tag -$tag '*'
 test_expect_equal_file $EXPECTED/notmuch-hello-long-names OUTPUT
 
 test_begin_subtest "All tags show up"
+test_subtest_known_broken
 tag=exclude_me
 notmuch tag +$tag '*'
 notmuch config set search.exclude_tags $tag

test/emacs.expected-output/notmuch-hello-all-tags

@@ -1,9 +1,5 @@
    Welcome to notmuch. You have 52 messages.
 
-Saved searches: [edit]
-
-	  52 inbox           52 unread          52 all mail
-
 Search:                                                                     .
 
 All tags: [hide]