cleanup make help

Author: rok-cesnovar

makefile

@@ -47,8 +47,6 @@ help:
 	@echo '      * rev -> prim'
 	@echo '      * fwd -> prim'
 	@echo '      * mix -> {rev, fwd, prim}'
-	@echo '      * within {prim, rev, fwd, mix}: mat -> arr -> scal'
-	@echo '      * only include {prim, rev, fwd, mix}/meta.hpp from the meta subfolders'
 	@echo ''
 	@echo '  Cpplint'
 	@echo '  - cpplint       : runs cpplint.py on source files. requires python 2.7.'