Remove old implementations

Author: izumin5210

analyzer.go

@@ -20,6 +20,33 @@ var Analyzer = &analysis.Analyzer{
 Run: runAnalyze,
 }
 
+var (
+// WrapperFuncList contains "path/to/pkg.Funcname" strings that adds a context to errors.
+WrapperFuncList = []string{
+// stdlibs
+"errors.New",
+"fmt.Errorf",
+
+// github.com/pkg/errors
+"github.com/pkg/errors.Errorf",
+"github.com/pkg/errors.New",
+"github.com/pkg/errors.WithMessage",
+"github.com/pkg/errors.WithStack",
+"github.com/pkg/errors.Wrap",
+"github.com/pkg/errors.Wrapf",
+
+// github.com/srvc/fail
+"github.com/srvc/fail.Errorf",
+"github.com/srvc/fail.New",
+"github.com/srvc/fail.Wrap",
+}
+)
+
+type errIdent struct {
+*ast.Ident
+wrapped bool
+}
+
 var wrapperFuncSet map[string]struct{}
 
 func init() {