Is there a flag for :s[ubstitute] in Vim that will not save the pattern?

user_52035 0
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I'm trying to create an autocmd that will replace all the whitespaces in the file when I exit the insert mode. However, AFAIK that would make Vim remember the pattern and remove what was already in there.

" Add function for remove tailing whitespaces
command! CleanupTrailingSpaces :%s/\s\+$//ge | :nohlsearch
autocmd InsertLeave * :CleanupTrailingSpaces

Is there a flag for :s[ubstitute] that will make it not saving the pattern?

substitution vim regex
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