[gimp] app: don't register action for GimpOperationTool

[Ell <ell src gnome org>]

commit 2255d628916565e4be5cb97119fb554bfe96fb6b
Author: Ell <ell_se yahoo com>
Date:   Wed Jan 29 21:40:59 2020 +0200

    app: don't register action for GimpOperationTool
    
    Allow creating GimpToolInfo objects with a NULL menu label, and do
    that for GimpOperationTool.  The previous commit effectively
    removed it from the Preferences tool editor, and this commit also
    removes it from the action search.

 app/core/gimptoolinfo.c       | 1 -
 app/tools/gimpoperationtool.c | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/app/core/gimptoolinfo.c b/app/core/gimptoolinfo.c
index b5e1ae90a7..b6531f70f5 100644
--- a/app/core/gimptoolinfo.c
+++ b/app/core/gimptoolinfo.c
@@ -139,7 +139,6 @@ gimp_tool_info_new (Gimp                *gimp,
   g_return_val_if_fail (identifier != NULL, NULL);
   g_return_val_if_fail (label != NULL, NULL);
   g_return_val_if_fail (tooltip != NULL, NULL);
-  g_return_val_if_fail (menu_label != NULL, NULL);
   g_return_val_if_fail (help_id != NULL, NULL);
   g_return_val_if_fail (paint_core_name != NULL, NULL);
   g_return_val_if_fail (icon_name != NULL, NULL);
diff --git a/app/tools/gimpoperationtool.c b/app/tools/gimpoperationtool.c
index 22bef367a3..2c16ca351d 100644
--- a/app/tools/gimpoperationtool.c
+++ b/app/tools/gimpoperationtool.c
@@ -130,7 +130,7 @@ gimp_operation_tool_register (GimpToolRegisterCallback  callback,
                 "gimp-operation-tool",
                 _("GEGL Operation"),
                 _("Operation Tool: Use an arbitrary GEGL operation"),
-                N_("_GEGL Operation..."), NULL,
+                NULL, NULL,
                 NULL, GIMP_HELP_TOOL_GEGL,
                 GIMP_ICON_GEGL,
                 data);