Remove unneeded patches (discussed with upstream)

Internationalization setup is now in 'src/PlankMain.vala' file since 0.9.1
release

x11-wm/plank/files/patch-config.h.in

@@ -1,10 +0,0 @@
---- config.h.in.orig	2015-05-02 15:04:04 UTC
-+++ config.h.in
-@@ -1,5 +1,7 @@
- /* config.h.in.  Generated from configure.ac by autoheader.  */
- 
-+#undef INSTALL_PREFIX
-+
- /* Define the gettext package to be used */
- #undef GETTEXT_PACKAGE
- 

x11-wm/plank/files/patch-configure

@@ -1,20 +0,0 @@
---- configure.orig	2015-05-02 15:04:03 UTC
-+++ configure
-@@ -797,6 +797,7 @@ PLANK_MICRO_VERSION
- PLANK_MINOR_VERSION
- PLANK_MAJOR_VERSION
- PLANK_MAJOR_MINOR_VERSION
-+INSTALL_PREFIX
- LT_AGE
- LT_REVISION
- LT_CURRENT
-@@ -2330,6 +2331,9 @@ cat >>confdefs.h <<_ACEOF
- #define PACKAGE_URL "$PACKAGE_URL"
- _ACEOF
- 
-+cat >>confdefs.h <<_ACEOF
-+#define INSTALL_PREFIX "${prefix}"
-+_ACEOF
- 
- # Let the site file select an alternate cache file if it wants to.
- # Prefer an explicitly selected file to automatically selected ones.

x11-wm/plank/files/patch-lib_Widgets_PreferencesWindow.vala

@@ -1,15 +0,0 @@
---- lib/Widgets/PreferencesWindow.vala.orig	2015-04-07 07:42:22 UTC
-+++ lib/Widgets/PreferencesWindow.vala
-@@ -59,6 +59,12 @@ namespace Plank.Widgets
- 		
- 		construct
- 		{
-+			GLib.Intl.setlocale (LocaleCategory.ALL, "");
-+			string langpack_dir = GLib.Path.build_filename (Build.INSTALL_PREFIX, "share", "locale");
-+			GLib.Intl.bindtextdomain (Build.GETTEXT_PACKAGE, langpack_dir);
-+			GLib.Intl.bind_textdomain_codeset (Build.GETTEXT_PACKAGE, "UTF-8");
-+			GLib.Intl.textdomain (Build.GETTEXT_PACKAGE);
-+			
- 			skip_pager_hint = true;
- 			skip_taskbar_hint = true;
- 			title = _("Preferences");

x11-wm/plank/files/patch-vapi_config.vapi

@@ -1,11 +0,0 @@
---- vapi/config.vapi.orig	2015-04-27 13:44:43 UTC
-+++ vapi/config.vapi
-@@ -32,6 +32,8 @@ namespace Build
- 	public const string VERSION;
- 	public const string VERSION_INFO;
- 
-+	public const string INSTALL_PREFIX;
-+
- 	public const uint VERSION_MAJOR;
- 	public const uint VERSION_MINOR;
- 	public const uint VERSION_MICRO;