ivi-shell: rename to ivi_layout_layer_destroy()

"remove" is not proper name beacause it destorys a layer. The name of
the api is changed from layer_remove to layer_destroy.

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
diff --git a/ivi-shell/ivi-layout-export.h b/ivi-shell/ivi-layout-export.h
index 68d3760..8a92009 100644
--- a/ivi-shell/ivi-layout-export.h
+++ b/ivi-shell/ivi-layout-export.h
@@ -470,7 +470,7 @@
 	/**
 	 * \brief Removes a ivi_layer which is currently managed by the service
 	 */
-	void (*layer_remove)(struct ivi_layout_layer *ivilayer);
+	void (*layer_destroy)(struct ivi_layout_layer *ivilayer);
 
 	/**
 	 * \brief Get all ivi_layers which are currently registered and managed