It looks like m2e-wro4j is not used at all in JBoss Tools (only referenced in Central).
It also appears that other m2e extensions (maven.apt and m2e.jdt) are not necessary to build JBT, and are only made available by default in JBDS installer and on Central.

So I suggest the following changes:

• Remove the 3 maven extensions (m2e.wro4j, maven.apt, m2e.jdt) from the JBT target-platform, and keep them only in Central
• Remove m2e.wro4j from JBDS TP (as it's not part of installer)