- Removed obsolete functions from SimCodeUtil.mo (all these functions…

… were protected and not used anywhere including comments):

  - filterNonConstant
  - extractDiscEqs
  - emptyHashTable
  - stateindex
  - createAlgorithmAndEquationAssertsFromAlgsEqnTraverser
  - bytesToRealMBString
  - indexSubscriptToExp
  - isMixedSystem
  - getCallPath
  - removeDuplicatePaths
  - Belonging auxiliary functions were removed as well


git-svn-id: https://openmodelica.org/svn/OpenModelica/trunk@23200 f25d12d1-65f4-0310-ae8a-bbce733d8d8e