Ports/SDLPoP: Remove an unnecessary patch

This patch removed some previously unsupported scanf format specifiers.

We still don't support these properly, but we can parse and ignore
them, which is equivalent to what this patch was doing.

Ports/SDLPoP/patches/0003-Fix-SDL2-include-path.patch

@@ -0,0 +1,28 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Gunnar Beutner <gunnar@beutner.name>
+Date: Mon, 19 Apr 2021 16:17:10 +0200
+Subject: [PATCH] Fix SDL2 include path
+
+SDL2 headers are installed into /usr/local under SDL2, make it so
+they're found.
+---
+ src/CMakeLists.txt | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
+index 3558a6c78bda56023dc23b271d01a9026a7aed5b..d074e488bf2b493a553e1920fd8fafdb8b1965ea 100644
+--- a/src/CMakeLists.txt
++++ b/src/CMakeLists.txt
+@@ -14,10 +14,10 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${SDLPoP_SOURCE_DIR}/..")
+ 
+ # On macOS, if you used Homebrew to install SDL2, the location may be something like this:
+ 
+-#set(SDL2 "/usr/local/Cellar/sdl2/2.0.5")
++set(SDL2 "/usr/local")
+ 
+ if (NOT(WIN32) AND (DEFINED SDL2))
+-    include_directories(${SDL2}/include)
++    include_directories(${SDL2}/include/SDL2)
+     link_directories(${SDL2}/lib)
+ endif()
+