fix: remove not exsited reference

Author: zhang-hongjie

src/tool.sh

@@ -64,7 +64,7 @@ function confirm_to_continue() {
 # @EXAMPLES
 #     wait_for 'test -f /tmp/output.txt' 'file existed' 3
 # @SEE_ALSO
-#     confirm_to_continue, stop_if_failed, is_http_ok
+#     confirm_to_continue, stop_if_failed
 function wait_for() {
 	local predicate="${1}"
 	local subject="${2-${predicate}}"