[PATCH] configure: Remove spurious [] from tr

["Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

ShellCheck points out that tr '[a-z]' actually replaces the []'s
and only the a-z is needed.

Remove the spurious [] - although in this use it will make no
difference.

Fixes: bb55b712e8dc4d4eb515144d5c26798fea178cba
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 configure | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure b/configure
index 9a79a004d7..5bb8c2a59d 100755
--- a/configure
+++ b/configure
@@ -4549,7 +4549,7 @@ if test "$gprof" = "yes" ; then
 fi
 echo "CONFIG_AUDIO_DRIVERS=$audio_drv_list" >> $config_host_mak
 for drv in $audio_drv_list; do
-    def=CONFIG_AUDIO_$(echo $drv | LC_ALL=C tr '[a-z]' '[A-Z]')
+    def=CONFIG_AUDIO_$(echo $drv | LC_ALL=C tr 'a-z' 'A-Z')
     echo "$def=y" >> $config_host_mak
 done
 if test "$alsa" = "yes" ; then
-- 
2.31.1