Remove obsolete target

Author: Steve Powell

Makefile

@@ -87,13 +87,3 @@ stage-and-promote-maven-bundle: maven-bundle
 	    -Dnexus.description="Public release of $$VERSION" \
 	)
 
-promote-maven-bundle:
-	( \
-	  NEXUS_USERNAME=`cat $(GNUPG_PATH)/../nexus/username`; \
-	  NEXUS_PASSWORD=`cat $(GNUPG_PATH)/../nexus/password`; \
-	    -Dnexus.url=http://oss.sonatype.org \
-	    -Dnexus.username=$$NEXUS_USERNAME \
-	    -Dnexus.password=$$NEXUS_PASSWORD \
-	    -DtargetRepositoryId=releases \
-	    -B \
-	)