gmfVersion should not be needed anymore in the build script. Removing
diff --git a/releng/org.eclipse.gmf.releng.target/build.cfg b/releng/org.eclipse.gmf.releng.target/build.cfg
index 51c7d01..23040bb 100644
--- a/releng/org.eclipse.gmf.releng.target/build.cfg
+++ b/releng/org.eclipse.gmf.releng.target/build.cfg
@@ -1,5 +1,4 @@
# TODO: generate this file based on parameters found in dependent feature.xml files.
-gmfVersion=1.0.0
##############################################################
# Base Eclipse dependency