[TASK] Remove superfluous parenthesis in sysexts

Superfluous brackets in extbase after namespaces move

Change ("a" . "b") . "c" into "a" . "b" . "c" using the lex-pass tool.

Change-Id: I0c72e4b899db7c87b2513f8546012bbb815a7220
Resolves: #41015
Related: #40095
Releases: 6.0
Reviewed-on: http://review.typo3.org/14677
Reviewed-by: Oliver Hader
Tested-by: Oliver Hader