Remove ffjson because of gccgo issues

Fixes #362

Signed-off-by: Michael Crosby <[email protected]>

Author: crosbymichael

Makefile

@@ -64,11 +64,6 @@ endif
 .gitvalidation:
 	git-validation -q -run DCO,short-subject -v -range $(EPOCH_TEST_COMMIT)..HEAD
 
-# `go get https://github.com/pquerna/ffjson`
-ffjson:
-	cd specs-go/ && ffjson -force-regenerate config.go
-	cd specs-go/ && ffjson -force-regenerate state.go
-
 clean:
 	rm -rf output/ *~