ci: cancel code coverage publishing to codecov.io service.

The codecov bot doesn't do anything useful to us as we don't care much
about a percentage of code coverage. JaCoCo is enough. So this is why I
have decided to decommission CodeCov.

Addressed to #1105

Author: php-coder

.travis.yml

@@ -52,10 +52,6 @@ after_success:
   - if [ "$SPRING_PROFILES_ACTIVE" = 'travis' ]; then
       ./src/main/scripts/show-spring-boot-version-diff.sh;
     fi
-  - if [ "$SPRING_PROFILES_ACTIVE" = 'travis' ]; then
-      ./src/main/scripts/ci/publish-code-coverage.sh;
-      sleep 5;
-    fi
 
 deploy:
   provider: script

.travis/codecov.yml

@@ -1,5 +1,6 @@
 0.x (upcoming release)
 - (feature) add possibility for search series by catalog number in user's collection (contributed by Mukesh Katariya)
+- (ci)      cancel code coverage publishing to codecov.io service
 
 0.4
 - (infrastructure) switched to Java8

NEWS.txt

@@ -1,7 +1,6 @@
 # My Stamps
 
 [![Build Status](https://travis-ci.org/php-coder/mystamps.svg?branch=master)](https://travis-ci.org/php-coder/mystamps)
-[![Coverage Status](https://codecov.io/gh/php-coder/mystamps/branch/master/graph/badge.svg)](https://codecov.io/gh/php-coder/mystamps)
 [![PDD Status](http://www.0pdd.com/svg?name=php-coder/mystamps)](http://www.0pdd.com/p?name=php-coder/mystamps)
 
 ## What's it?