Remove redundant #' before lambda in Gnus

Remove redundant #' before lambda in Gnus

* lisp/gnus/gnus-group.el (gnus-group-list-cached)
(gnus-group-list-dormant, gnus-group-list-ticked):
* lisp/gnus/gnus-registry.el (gnus-registry-remove-extra-data):
* lisp/gnus/gnus-score.el (gnus-score-edit-file-at-point):
* lisp/gnus/gnus-sum.el (gnus-fetch-headers):
* lisp/gnus/mm-partial.el (mm-inline-partial):
* lisp/gnus/nnselect.el (nnselect-uncompress-artlist)
(numbers-by-group, nnselect-request-expire-articles)
(nnselect-request-update-info, nnselect-request-thread):
* lisp/gnus/nnvirtual.el (nnvirtual-request-expire-articles):
* lisp/gnus/spam-stat.el (spam-stat-score-buffer): Remove redundant #'
before lambda.