vim command to delete {…}
%s/{\_.\{-\}}//gBreakdown of this command:
:%s→ Substitute (s) across the whole file (%).{→ Matches the literal{.\_.→ Matches any character including newlines.\{-}→ Matches as little as possible (non-greedy).}→ Matches the literal}.//g→ Replaces matches with nothing (deleting them).
It is stranger that regex in vim are different from ‘normal’ regex. This is the expression you would normally use:
/\{[\s\S]*?\}/gm