Testing Branch_5_0 with the 5.0.1.GA jboss-javee release containing the removal of the jboss-servlet-apis exposed a transitive dependency on those APIs from jboss-ejb3-core:

[INFO] +- org.jboss.ejb3:jboss-ejb3-core:jar:client:1.0.0-Beta11:compile
[INFO] | +- org.jboss.integration:jboss-jca-spi:jar:5.0.3.GA:compile
[INFO] | +- org.jboss.ejb3:jboss-ejb3-async:jar:0.1.1:compile
[INFO] | +- org.jboss.ejb3:jboss-ejb3-cache:jar:0.13.0:compile
[INFO] | +- org.jboss.ejb3:jboss-ejb3-common:jar:1.0.0-Beta4:compile
[INFO] | +- org.jboss.ejb3:jboss-ejb3-security:jar:1.0.0-Beta2:compile
[INFO] | +- org.jboss.ejb3:jboss-ejb3-ext-api:jar:0.4:compile
[INFO] | +- org.jboss.ejb3:jboss-ejb3-ext-api-impl:jar:0.4.1:compile
[INFO] | +- org.jboss.ejb3:jboss-ejb3-interceptors:jar:1.0.0-Beta4:compile
[INFO] | +- org.jboss.ejb3:jboss-ejb3-metadata:jar:0.13.0:compile
[INFO] | +- org.jboss.ejb3:jboss-ejb3-proxy:jar:1.0.0-Beta6:compile
[INFO] | +- org.jboss.ejb3:jboss-ejb3-proxy-clustered:jar:1.0.0-Beta3:compile
[INFO] | +- org.jboss.ejb3:jboss-ejb3-transactions:jar:1.0.0-Beta1:compile
[INFO] | +- org.jboss.javaee:jboss-servlet-api:jar:2.5.0.CR1:compile <============================
[INFO] | +- org.jboss.jpa:jboss-jpa-deployers:jar:1.0.0-Beta4:compile
[INFO] | +- sun-jaxws:jaxws-api:jar:2.1.1:compile
[INFO] | - sun-jaxws:jsr181-api:jar:2.1.1:compile

My testing is currently being done with an explicit exclusion in component-matrix/pom.xml.