[TASK] Remove superfluous parenthesis in sysexts

Superfluous brackets in fluid after namespaces move
Change ("a" . "b") . "c" into "a" . "b" . "c" using the lex-pass tool.

Resolves: #41016
Related: #40095
Releases: 6.0
Change-Id: I64741473cb24eda343f0576ebd1a0f1846dfc3f8
Reviewed-on: http://review.typo3.org/14675
Reviewed-by: Oliver Hader
Tested-by: Oliver Hader