Rename part of filename using regex

I have a bunch of files where there is additional information in square brackets. I would like to rename them by removing that section.

For example:

filename [additional info 1].ext1
anotherfile [different info 2].ext2

Want to rename to:

filename.ext1
anotherfile.ext2

I tried playing with regex (and using the rename command) but without success. Does anybody know a way to have the rename command strip of only the part of ” [….]” (including the leading space).

Answer

Looping for each file and using sed for some simple regex matching:

for i in *.ext*; do 
    mv "$i" "$(sed 's/ [[^]]*]././' <<<"$i")"
done

Tested with:

$ touch 'filename [additional info 1].ext1' 'filename [additional info 2].ext2'
$ for i in *.ext*; do mv -v "$i" "$(sed 's/ [[^]]*]././' <<<"$i")"; done
renamed 'filename [additional info 1].ext1' -> 'filename.ext1'
renamed 'filename [additional info 2].ext2' -> 'filename.ext2'