Fix: Remove classes used for construction of header

[localheinz]

This PR

• removes classes used for construction of heade

💁‍♂ Use ergebnis/license instead.

[codecov]

Codecov Report

Merging #50 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##             master    #50    +/-   ##
========================================
  Coverage       100%   100%            
+ Complexity       44      8    -36     
========================================
  Files            10      2     -8     
  Lines           130     26   -104     
========================================
- Hits            130     26   -104

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