fix: remove unused imports in sqlitecgo test file

Remove unused gcode and gerror imports that were left over after
updating AllAndCount test expectations.

Author: lingcoder

contrib/drivers/sqlitecgo/sqlitecgo_z_unit_model_test.go

@@ -20,8 +20,6 @@ import (
 	"github.com/gogf/gf/v2/container/gvar"
 	"github.com/gogf/gf/v2/database/gdb"
 	"github.com/gogf/gf/v2/encoding/gjson"
-	"github.com/gogf/gf/v2/errors/gcode"
-	"github.com/gogf/gf/v2/errors/gerror"
 	"github.com/gogf/gf/v2/frame/g"
 	"github.com/gogf/gf/v2/os/glog"
 	"github.com/gogf/gf/v2/os/gtime"