[TASK] Remove superfluous parenthesis in sysexts

Removes superfluous parenthesis in sysexts "felogin", "filelist",
"form" and "func".

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

Change-Id: I2e9e0b8e339dae93c0361a6ba36e41beb0f54711
Resolves: #40965
Related: #40095
Reviewed-on: http://review.typo3.org/14624
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Jigal van Hemert
Tested-by: Jigal van Hemert