Fix metalinter errors

Makefile

@@ -52,7 +52,6 @@ metalinter: tools
 metalinter_test: tools
 	@gometalinter --install
 	gometalinter --vendor --deadline=600s --disable-all  \
-		--enable=aligncheck \
 		--enable=deadcode \
 		--enable=gas \
 		--enable=goconst \
@@ -71,6 +70,7 @@ metalinter_test: tools
 		--enable=vetshadow \
 		./...
 
+		# --enable=aligncheck \  <== disabled as not installed
 		#--enable=dupl \
 		#--enable=errcheck \
 		#--enable=gocyclo \

example/dummy/persistent_dummy.go

@@ -137,16 +137,6 @@ func (app *PersistentDummyApplication) EndBlock(height uint64) (resEndBlock type
 	return types.ResponseEndBlock{Diffs: app.changes}
 }
 
-//-----------------------------------------
-// persist the last block info
-
-var lastBlockKey = []byte("lastblock")
-
-type LastBlockInfo struct {
-	Height  uint64
-	AppHash []byte
-}
-
 //---------------------------------------------
 // update validators