[TASK] Cleanup sysext "taskcenter" and "tsconfig_help"

Change-Id: I2658e5d0a7ae979f93b60713294adcbe8e41db09
Resolves: #46145
Releases: 6.1
Reviewed-on: https://review.typo3.org/18822
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
[TASK] Cleanup filelist

Change-Id: If107bd20db15d1881c12097adecd342b8e1979aa
Resolves: #45143
Releases: 6.1
Reviewed-on: https://review.typo3.org/18005
Reviewed-by: Stefan Neufeind
Reviewed-by: Philipp Gampe
Tested-by: Philipp Gampe
Reviewed-by: Oliver Klee
Reviewed-by: Felix Kopp
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn