Remove inactive initiatives from maintainers list

added 7 commits

69860b52 - Revert "Issue #3445224 by catch, Gábor Hojtsy: Update composer metapackages"
d30626c1 - Issue #3445211 by benjifisher, tobiasb: Composer tests fail because of invalid Drupal version
86cd44de - Revert "Issue #3445211 by benjifisher, tobiasb: Composer tests fail because of...
54da2ca6 - Issue #3445211 by catch, longwave, benjifisher, drumm, tobiasb: Composer tests...
6d1796ca - Issue #3446577 by mondrake: Prepare test docblocks for annotation conversion to attributes
80284a1e - Issue #3448036 by mikelutz: InstallerTranslationExistingFileTest fails on 11.x branch
e920b2e9 - Issue #3440837 by sime: Test setup should copy default.settings.php/services.yml from assets

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