Remove some dead assignments

gtk/gtkbuilder.c

@@ -289,7 +289,6 @@ gtk_builder_init (GtkBuilder *builder)
 {
   GtkBuilderPrivate *priv = gtk_builder_get_instance_private (builder);
 
-  priv = gtk_builder_get_instance_private (builder);
   priv->domain = NULL;
   priv->objects = g_hash_table_new_full (g_str_hash, g_str_equal,
                                          g_free, g_object_unref);

gtk/gtkcellrenderertoggle.c

@@ -408,7 +408,6 @@ gtk_cell_renderer_toggle_snapshot (GtkCellRenderer      *cell,
   GtkBorder padding, border;
   GtkCssImageBuiltinType image_type;
 
-  context = gtk_widget_get_style_context (widget);
   gtk_cell_renderer_toggle_get_size (cell, widget, cell_area,
 				     &x_offset, &y_offset,
 				     &width, &height);

gtk/gtkcolorchooserwidget.c

@@ -537,8 +537,6 @@ gtk_color_chooser_widget_init (GtkColorChooserWidget *cc)
   AtkObject *atk_obj;
   gchar *text, *name;
 
-  priv = gtk_color_chooser_widget_get_instance_private (cc);
-
   priv->use_alpha = TRUE;
 
   gtk_orientable_set_orientation (GTK_ORIENTABLE (cc), GTK_ORIENTATION_VERTICAL);

gtk/gtkquery.c

@@ -40,9 +40,6 @@ finalize (GObject *object)
   GtkQuery *query = GTK_QUERY (object);
   GtkQueryPrivate *priv = gtk_query_get_instance_private (query);
 
-
-  query = GTK_QUERY (object);
-
   g_clear_object (&priv->location);
   g_free (priv->text);
   g_strfreev (priv->words);