Simplified json error check

Author: mikefarah

pkg/yqlib/encoder.go

@@ -45,11 +45,7 @@ func (o *orderedMap) UnmarshalJSON(data []byte) error {
 
 		// cycle through k/v
 		var tok json.Token
-		for tok, err = dec.Token(); !errors.Is(err, io.EOF); tok, err = dec.Token() {
-			if err != nil && !errors.Is(err, io.EOF) {
-				return err
-			}
-
+		for tok, err = dec.Token(); err == nil; tok, err = dec.Token() {
 			// we can expect two types: string or Delim. Delim automatically means
 			// that it is the closing bracket of the object, whereas string means
 			// that there is another key.