bpo-45975: IDLE - Remove extraneous parens (GH-31107)

mistakenly included in 3 files in previous PR
and backported both to 3.10 and 3.9.
(cherry picked from commit 916d0d822c79933f4c420f7a36f16f3eb788646b)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>