Remove GitHub handles for maintainers

GOVERNANCE.md

@@ -24,15 +24,15 @@ must be based on full consensus within the steering group.
 
 The following are the repositories that are governed by the steering group. 
 
-- <https://github.com/softwarepub/hermes> (Maintainer: Stephan Druskat - @sdruskat)
-- <https://github.com/softwarepub/ci-templates> (Maintainer: Oliver Bertuch - @poikilotherm)
+- <https://github.com/softwarepub/hermes> (Maintainer: Stephan Druskat)
+- <https://github.com/softwarepub/ci-templates> (Maintainer: Oliver Bertuch)
 - <https://github.com/softwarepub/hermes-harvest-template> (Maintainer: tbc)
-- <https://github.com/softwarepub/hermes-plugin-git> (Maintainer: Sophie Kernchen - @SKernchen)
-- <https://github.com/softwarepub/hermes-plugin-python> (Maintainer: Michael Meinel - @led02)
-- <https://github.com/softwarepub/showcase> (Maintainer: Oliver Bertuch - @poikilotherm)
-- <https://github.com/softwarepub/schema.software-metadata.pub> (Maintainer: Michael Meinel - @led02)
-- <https://github.com/softwarepub/github-action> (Maintainer: Oliver Bertuch - @poikilotherm)
-- <https://github.com/softwarepub/concept-paper> (Maintainer: Stephan Druskat - @sdruskat)
+- <https://github.com/softwarepub/hermes-plugin-git> (Maintainer: Sophie Kernchen)
+- <https://github.com/softwarepub/hermes-plugin-python> (Maintainer: Michael Meinel)
+- <https://github.com/softwarepub/showcase> (Maintainer: Oliver Bertuch)
+- <https://github.com/softwarepub/schema.software-metadata.pub> (Maintainer: Michael Meinel)
+- <https://github.com/softwarepub/github-action> (Maintainer: Oliver Bertuch)
+- <https://github.com/softwarepub/concept-paper> (Maintainer: Stephan Druskat)
 
 ### HERMES Steering Group