remove dependency

go.mod

@@ -2,9 +2,6 @@ module gfx.cafe/ghalliday1/pgparser
 
 go 1.19
 
-require (
-	github.com/antlr/antlr4/runtime/Go/antlr v1.4.10
-	github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20220911224424-aa1f1f12a846
-)
+require github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20220911224424-aa1f1f12a846
 
 require golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e // indirect

go.sum

-github.com/antlr/antlr4/runtime/Go/antlr v1.4.10 h1:yL7+Jz0jTC6yykIK/Wh74gnTJnrGr5AyrNMXuA0gves=
-github.com/antlr/antlr4/runtime/Go/antlr v1.4.10/go.mod h1:F7bn7fEU90QkQ3tnmaTx3LTKLEDqnwWODIYppRQ5hnY=
 github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20220911224424-aa1f1f12a846 h1:et5J11AOyUn9qwkIAF9kcxTxjTO8Z9oSmlOqH7MVSPo=
 github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20220911224424-aa1f1f12a846/go.mod h1:pSwJ0fSY5KhvocuWSx4fz3BA8OrA1bQn+K1Eli3BRwM=
 golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e h1:+WEEuIdZHnUeJJmEUjyYC2gfUMj69yZXw17EnHg/otA=