Remove manual adding of coverity certificate since we do not have sudo rights

.travis.yml

@@ -244,7 +244,6 @@ before_install: |
 
  # Exit travis if on coverity_scan branch and not first build
  test $TRAVIS_BRANCH != coverity_scan -o ${TRAVIS_JOB_NUMBER##*.} = 1 || exit 0
- if [ ${TRAVIS_OS_NAME} == "linux" ]; then echo -n | openssl s_client -connect scan.coverity.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' | sudo tee -a /etc/ssl/certs/ca-; fi
  if [ ${TRAVIS_OS_NAME} == "linux" ]; then sh ./tools/travis/travis_linux_before_install.sh; fi
  if [ ${TRAVIS_OS_NAME} == "osx" ]; then sh ./tools/travis/travis_osx_before_install.sh; fi