Redundant artifacts in Maven repository

The following artifacts are redundant because they already exist in Maven central:

Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/com/sun/xml/bind/jaxb-impl/2.2.3-1/jaxb-impl-2.2.3-1-sources.jar with different content
Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/com/sun/xml/bind/jaxb-impl/2.2.3-1/jaxb-impl-2.2.3-1.jar with different content
Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/com/sun/xml/bind/jaxb-impl/2.2.3-1/jaxb-impl-2.2.3-1.pom with different content
Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/javax/xml/stream/stax-api/1.0-2/stax-api-1.0-2-sources.jar with different content
Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/javax/xml/stream/stax-api/1.0-2/stax-api-1.0-2.jar with different content
Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/javax/xml/stream/stax-api/1.0-2/stax-api-1.0-2.pom with different content
Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/org/antlr/antlr4-master/4.5.1-1/antlr4-master-4.5.1-1.pom with different content
Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/org/antlr/antlr4-runtime/4.5.1-1/antlr4-runtime-4.5.1-1-sources.jar with different content
Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/org/antlr/antlr4-runtime/4.5.1-1/antlr4-runtime-4.5.1-1.jar with different content
Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/org/antlr/antlr4-runtime/4.5.1-1/antlr4-runtime-4.5.1-1.pom with different content
Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/org/mortbay/jetty/servlet-api/2.5-20081211/servlet-api-2.5-20081211-sources.jar with different content
Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/org/mortbay/jetty/servlet-api/2.5-20081211/servlet-api-2.5-20081211.jar with different content
Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/org/mortbay/jetty/servlet-api/2.5-20081211/servlet-api-2.5-20081211.pom with different content
Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/org/objectweb/howl/howl/1.0.1-1/howl-1.0.1-1-sources.jar with different content
Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/org/objectweb/howl/howl/1.0.1-1/howl-1.0.1-1.jar with different content
Remote repository http://repo1.maven.org/maven2/ contains already artifact http://repo1.maven.org/maven2/org/objectweb/howl/howl/1.0.1-1/howl-1.0.1-1.pom with different content