Fix for mocking Exec with custom []string datatype
diff --git a/expectations_go18.go b/expectations_go18.go
index 2d5ccba..6ee8adf 100644
--- a/expectations_go18.go
+++ b/expectations_go18.go
@@ -4,7 +4,6 @@
 
 import (
 	"database/sql"
-	"database/sql/driver"
 	"fmt"
 	"reflect"
 )
@@ -54,10 +53,6 @@
 			return fmt.Errorf("could not convert %d argument %T - %+v to driver value: %s", k, e.args[k], e.args[k], err)
 		}
 
-		if !driver.IsValue(darg) {
-			return fmt.Errorf("argument %d: non-subset type %T returned from Value", k, darg)
-		}
-
 		if !reflect.DeepEqual(darg, v.Value) {
 			return fmt.Errorf("argument %d expected [%T - %+v] does not match actual [%T - %+v]", k, darg, darg, v.Value, v.Value)
 		}