remove unused methods
remove unused methods

- remove BasicEvaluator.strip_state_vector(),
  LCBCEvaluator.strip_state_vector()

BubuLK/sfepy,BubuLK/sfepy,RexFuzzle/sfepy,vlukes/sfepy,BubuLK/sfepy,vlukes/sfepy,lokik/sfepy,RexFuzzle/sfepy,lokik/sfepy,sfepy/sfepy,rc/sfepy,lokik/sfepy,vlukes/sfepy,sfepy/sfepy,RexFuzzle/sfepy,rc/sfepy,sfepy/sfepy,lokik/sfepy,rc/sfepy,RexFuzzle/sfepy