refator: remove unused code

go.mod

@@ -7,7 +7,6 @@ require (
 	github.com/awalterschulze/gographviz v0.0.0-20190522210029-fa59802746ab
 	github.com/boyter/scc v2.10.1+incompatible
 	github.com/dbaggerman/cuba v0.3.2 // indirect
-	github.com/dghubble/trie v0.0.0-20200716043226-5a94efb202d5
 	github.com/huleTW/bad-smell-analysis v0.1.0
 	github.com/iancoleman/strcase v0.0.0-20191112232945-16388991a334
 	github.com/mattn/go-shellwords v1.0.6