warzone2100: remove leftover patch

srcpkgs/warzone2100/patches/fix-FTBFS.patch

@@ -1,23 +0,0 @@
-editbox.cpp:127:9: error: ambiguous overload for 'operator==' (operand types are 'QChar' and 'char')
-  if (ch == '\0')
-
---- lib/widget/editbox.cpp.orig
-+++ lib/widget/editbox.cpp
-@@ -124,7 +124,7 @@ void W_EDITBOX::initialise()
- /* Insert a character into a text buffer */
- void W_EDITBOX::insertChar(QChar ch)
- {
--	if (ch == '\0')
-+	if (ch == QChar('\0'))
- 	{
- 		return;
- 	}
-@@ -150,7 +150,7 @@ void W_EDITBOX::insertChar(QChar ch)
- /* Put a character into a text buffer overwriting any text under the cursor */
- void W_EDITBOX::overwriteChar(QChar ch)
- {
--	if (ch == '\0')
-+	if (ch == QChar('\0'))
- 	{
- 		return;
- 	}