Misc/Travis: Remove Coverity addon

It was a good idea but it doesn't work in pratice.

.travis.yml

@@ -10,29 +10,14 @@ before_install:
   - sudo apt-get install build-essential libtool gcc-4.8 g++-4.8 make cmake openssl libssl-dev libmysqlclient15-dev libmysql++-dev libreadline6-dev zlib1g-dev libbz2-dev libboost1.55-dev libboost-thread1.55-dev libboost-system1.55-dev libboost-program-options1.55-dev
   - mkdir bin
   - cd bin
-  - cmake ../ -DWITH_WARNINGS=1 -DWITH_COREDEBUG=1 -DUSE_COREPCH=0 -DUSE_SCRIPTPCH=0 -DTOOLS=1 -DSCRIPTS=1 -DSERVERS=1 -DCMAKE_BUILD_TYPE=Release
+  - cmake ../ -DWITH_WARNINGS=1 -DWITH_COREDEBUG=1 -DUSE_COREPCH=1 -DUSE_SCRIPTPCH=1 -DTOOLS=1 -DSCRIPTS=1 -DSERVERS=1 -DCMAKE_BUILD_TYPE=Release
 
-script: if [ ${COVERITY_SCAN_BRANCH} != 1 ]; then make CFLAGS='-O0' CXXFLAGS='-O0' -j16 ; fi
+script: make -j 16
 
 branches:
   only:
     - master
     - 4.3.4
-    - coverity_scan
 
 git:
   depth: 1
-
-env:
-  global:
-    - secure: "n8J4aCfW8adZJbUPvKFM4HXkJ1pxaHfWnFNbcqma7aGETes3q7vN5jDuX2D9kplM9Er83Gl1ygiunocty8ncLLJqnP8+86bHUY5Q79qiYIL0Ak10CDBYck6TQKCCIT2NCRVRHVHkqYhad873tJ38qCfGW+G+t8nOSOWEsHAbxrE="
-
-addons:
-  coverity_scan:
-    project:
-      name: "TrinityCore/TrinityCore"
-      description: "Build submitted via Travis CI"
-    notification_email: dnpd.dd@gmail.com
-    build_command_prepend: ""
-    build_command: "make -j16"
-    branch_pattern: coverity_scan