Fix golangci-lint issues

Author: elias19r

baked_in.go

@@ -2123,11 +2123,8 @@ func isDatetime(fl FieldLevel) bool {
 
 	if field.Kind() == reflect.String {
 		_, err := time.Parse(param, field.String())
-		if err != nil {
-			return false
-		}
 
-		return true
+		return err == nil
 	}
 
 	panic(fmt.Sprintf("Bad field type %T", field.Interface()))

validator_test.go

@@ -9375,7 +9375,7 @@ func TestUniqueValidationStructSlice(t *testing.T) {
 			}
 		}
 	}
-	PanicMatches(t, func() { validate.Var(testStructs, "unique=C") }, "Bad field name C")
+	PanicMatches(t, func() { _ = validate.Var(testStructs, "unique=C") }, "Bad field name C")
 }
 
 func TestHTMLValidation(t *testing.T) {
@@ -10143,7 +10143,7 @@ func TestGetTag(t *testing.T) {
 	}
 
 	val := New()
-	val.RegisterValidation("mytag", func(fl FieldLevel) bool {
+	_ = val.RegisterValidation("mytag", func(fl FieldLevel) bool {
 		tag = fl.GetTag()
 		return true
 	})