[file-roller] Remove unused style_manager variable

[Jeremy Bicha <jbicha src gnome org>]

commit 6c1b8c9d0f548fbe04b7e0e585ba43b7cde835d9
Author: Jeremy Bicha <jeremy bicha canonical com>
Date:   Wed Feb 23 16:41:54 2022 -0500

    Remove unused style_manager variable

 src/fr-application.c | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/src/fr-application.c b/src/fr-application.c
index 17df6eb6..d7a6d906 100644
--- a/src/fr-application.c
+++ b/src/fr-application.c
@@ -449,7 +449,6 @@ static void
 fr_application_startup (GApplication *application)
 {
        GtkSettings     *gtk_settings;
-       HdyStyleManager *style_manager;
        gboolean         shell_shows_menubar;
 
     g_application_set_resource_base_path (application, "/org/gnome/FileRoller");