Remove redundant 'function's around lambdas

Remove redundant 'function's around lambdas

* lisp/allout.el (allout-latex-verb-quote):
* lisp/edmacro.el (edmacro-format-keys):
* lisp/ffap.el (ffap-all-subdirs-loop)
(ffap-kpathsea-expand-path, ffap-menu-rescan):
* lisp/files.el (save-buffers-kill-emacs):
* lisp/find-lisp.el (find-lisp-find-dired-internal)
(find-lisp-insert-directory):
* lisp/gnus/gnus-agent.el (gnus-agent-expire-unagentized-dirs):
* lisp/gnus/nnmairix.el (nnmairix-create-message-line-for-search)
(nnmairix-widget-get-values)
(nnmairix-widget-make-query-from-widgets)
(nnmairix-widget-build-editable-fields):
* lisp/international/mule-cmds.el (sort-coding-systems):
* lisp/international/mule-diag.el (list-character-sets-1):
* lisp/international/quail.el (quail-insert-decode-map):
* lisp/mail/reporter.el (reporter-dump-state):
* lisp/mail/supercite.el (sc-attribs-filter-namelist):
* lisp/pcmpl-gnu.el (pcmpl-gnu-zipped-files)
(pcmpl-gnu-bzipped-files):
* lisp/progmodes/cperl-mode.el (cperl-find-tags)
(cperl-write-tags, cperl-tags-hier-init, cperl-tags-treeify)
(cperl-menu-to-keymap, cperl-pod-spell):
* lisp/progmodes/gdb-mi.el (gdb-parent-mode):
* lisp/progmodes/make-mode.el (makefile-browser-fill):
* lisp/simple.el (transpose-lines):
* lisp/term.el:
* lisp/term/w32-win.el (w32-find-non-USB-fonts):
* lisp/textmodes/table.el (table--generate-source-scan-lines): Remove
redundant 'function's around lambdas.