Remove old, unused patches

wxGTK3-3.0.3-avoid-tlw-destroy-assert.patch

@@ -1,29 +0,0 @@
-From ce1dce113c5eda42f49ba3278bb21c61872ca37d Mon Sep 17 00:00:00 2001
-From: Paul Cornett <paulcor@users.noreply.github.com>
-Date: Mon, 28 Aug 2017 20:31:47 -0700
-Subject: [PATCH] Avoid delayed destruction if TLW was never created. See
- #17942
-
-(cherry picked from commit 4a71ba820f085a3d5a7233e9fd0e23ae4e45af58)
----
- src/common/toplvcmn.cpp | 6 +++---
- 1 file changed, 3 insertions(+), 3 deletions(-)
-
-diff --git a/src/common/toplvcmn.cpp b/src/common/toplvcmn.cpp
-index ef693690c5d..6a722f8be48 100644
---- a/src/common/toplvcmn.cpp
-+++ b/src/common/toplvcmn.cpp
-@@ -105,10 +105,10 @@ bool wxTopLevelWindowBase::Destroy()
-     // as we will be deleted anyhow during its destruction and the pointer
-     // stored in wxPendingDelete would become invalid, so just delete ourselves
-     // immediately in this case.
--    if ( wxWindow* parent = GetParent() )
-+    wxWindow* parent = GetParent();
-+    if ( (parent && parent->IsBeingDeleted()) || !GetHandle() )
-     {
--        if ( parent->IsBeingDeleted() )
--            return wxNonOwnedWindow::Destroy();
-+        return wxNonOwnedWindow::Destroy();
-     }
- 
-     // delayed destruction: the frame will be deleted during the next idle