Update CITATION.cff

CITATION.cff

@@ -9,18 +9,14 @@ authors:
     family-names: Maier
     orcid: 'https://orcid.org/0009-0002-0262-8208'
     affiliation: University of Technology Graz
-    email: lukas.maier@tugraz.at
   - given-names: Michael
     family-names: Mitterlindner
-    email: mitterlindner@tugraz.at
     affiliation: University of Technology Graz
   - given-names: Hadie
     family-names: Benabchiasli
-    email: hadie.asli@gmail.com
     affiliation: University of Technology Graz
   - given-names: Gregor
     family-names: Fasching
-    email: gregor.fasching@tugraz.at
     affiliation: University of Technology Graz
   - given-names: Stefan
     family-names: Radl