refactor: for consistency, don't use builtin jobs, just jobs

fisher.fish

@@ -457,7 +457,7 @@ function _fisher_rm -a pkg
 end
 
 function _fisher_jobs
-    builtin jobs $argv | command awk '/^[0-9]+\t/ { print $1 }'
+    jobs $argv | command awk '/^[0-9]+\t/ { print $1 }'
 end
 
 function _fisher_wait