Remove Coveralls config

We haven't used it in years.

Author: oschwald

pom.xml

@@ -181,24 +181,6 @@
                     <target>1.11</target>
                 </configuration>
             </plugin>
-            <plugin>
-                <groupId>org.eluder.coveralls</groupId>
-                <artifactId>coveralls-maven-plugin</artifactId>
-                <version>4.3.0</version>
-                <configuration>
-                    <serviceName>travis-ci</serviceName>
-                </configuration>
-            </plugin>
-            <plugin>
-                <groupId>org.codehaus.mojo</groupId>
-                <artifactId>cobertura-maven-plugin</artifactId>
-                <version>2.7</version>
-                <configuration>
-                    <format>xml</format>
-                    <maxmem>256m</maxmem>
-                    <check/>
-                </configuration>
-            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>