[gimp] app: cleaning unused variables.

[Jehan <jehanp src gnome org>]

commit 925d4c317f7735aa49291cdfb2248dd905328ea2
Author: Jehan <jehan girinstud io>
Date:   Wed Oct 12 17:53:04 2022 +0200

    app: cleaning unused variables.
    
    Removing build warnings!

 app/tools/gimptransformgridtool.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
---
diff --git a/app/tools/gimptransformgridtool.c b/app/tools/gimptransformgridtool.c
index 997cf6a64b..afceba34ac 100644
--- a/app/tools/gimptransformgridtool.c
+++ b/app/tools/gimptransformgridtool.c
@@ -1778,9 +1778,7 @@ gimp_transform_grid_tool_update_preview (GimpTransformGridTool *tg_tool)
 static void
 gimp_transform_grid_tool_update_filters (GimpTransformGridTool *tg_tool)
 {
-  GimpTool                 *tool      = GIMP_TOOL (tg_tool);
-  GimpTransformGridOptions *options   = GIMP_TRANSFORM_GRID_TOOL_GET_OPTIONS (tg_tool);
-  GimpImage                *image     = gimp_display_get_image (tool->display);
+  GimpTool                 *tool = GIMP_TOOL (tg_tool);
   GHashTable               *new_drawables;
   GList                    *drawables;
   GList                    *iter;