This works for me: 
#!/usr/bin/perl

use 5.010;
use strict;
use warnings;

my $doc = "'C-3PO' or 'See-Threepio' is a humanoid robot character fro
+m the [[Star Wars]] universe who appears in the original ''Star Wars'
+' films, the prequel trilogy and the sequel trilogy.";

$doc =~ s/[\[\]']+//g;

say $doc;

[download]
Did you mean that you want to only remove one single quote and not two of them?

In reply to Re: Remove double bracket and singe quotes by wee
in thread Remove double bracket and singe quotes by lobs

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