1 files changed, 1 insertions, 27 deletions
diff --git a/internal/feed/feed.go b/internal/feed/feed.go
index a43b7e9..c013877 100644
--- a/internal/feed/feed.go
+++ b/internal/feed/feed.go
@@ -9,9 +9,7 @@ import (
 )
 
 const (
-  DataVersion40 = iota // Version 4.0
-
-  OrNodeOp        // OR operator
+  OrNodeOp = iota // OR operator
   AndNodeOp       // And operator
 
   AdjacentNetwork // Adjacent Network attack vector.
@@ -42,30 +40,6 @@ const (
 
 // TODO: parse cpe
 
-// Data version for NVD feeds and feed items.
-type DataVersion int
-
-// Unmarshal DataVersion from JSON.
-func (me *DataVersion) UnmarshalJSON(b []byte) error {
-  // decode string, check for error
-  var s string
-  if err := json.Unmarshal(b, &s); err != nil {
-    return err
-  }
-
-  // check value
-  switch s {
-  case "4.0":
-    *me = DataVersion40
-  default:
-    // return error
-    return fmt.Errorf("unknown data version: %s", s)
-  }
-
-  // return success
-  return nil
-}
-
 // partial timestamp
 type PartialTime time.Time