Remove duplicate unit tests in TravisCI
Remove duplicate unit tests in TravisCI

The unit tests are already done via coverage tests.

stefanomarty/openxpki,openxpki/openxpki,aleibl/openxpki,oliwel/openxpki,aleibl/openxpki,openxpki/openxpki,aleibl/openxpki,aleibl/openxpki,oliwel/openxpki,openxpki/openxpki,stefanomarty/openxpki,oliwel/openxpki,oliwel/openxpki,oliwel/openxpki,aleibl/openxpki,openxpki/openxpki,stefanomarty/openxpki,stefanomarty/openxpki,stefanomarty/openxpki,stefanomarty/openxpki,aleibl/openxpki,oliwel/openxpki