removed coverity_scan from travis file

.travis.yml

@@ -22,19 +22,3 @@ after_success:
   - make json_unit CXXFLAGS="-fprofile-arcs -ftest-coverage -std=c++11"
   - ./json_unit "*"
   - coveralls --exclude test/catch.hpp --exclude test/unit.cpp --include src/json.hpp --gcov-options '\-lp' --gcov 'gcov-4.9'
-
-env:
-  global:
-   # The next declaration is the encrypted COVERITY_SCAN_TOKEN, created
-   #   via the "travis encrypt" command using the project repo's public key
-   - secure: "kzVz6s9W/rAs3e9nK5cU1vSXkNG0Kqe0g/WHybXNFVkiNTE/eauKgpcxc9QPnPVsLZmS9knANnf3V1/i/u50uYwrmf6ntlka67sXBiACnaYqUsGZ07F0i3evL84OsY/ViXmJ60AbcNDtCJR9oepAH7ANGHLL8z6yX4/m+Ocaj6s="
-
-addons:
-  coverity_scan:
-    project:
-      name: "nlohmann/json"
-      description: "Build submitted via Travis CI"
-    notification_email: niels.lohmann@gmail.com
-    build_command_prepend: "make clean"
-    build_command:   "make"
-    branch_pattern: master