mp4v2: rm old HandBrake patch

Patch no longer used by HandBrake upstream

pkgs/development/libraries/mp4v2/A02-meaningful-4gb-warning.patch

@@ -1,14 +0,0 @@
-diff -Naur mp4v2-trunk-r355/src/mp4atom.cpp mp4v2-trunk-r355/src/mp4atom.cpp
---- mp4v2-trunk-r355/src/mp4atom.cpp	2012-02-21 19:40:03.000000000 +0100
-+++ mp4v2-trunk-r355/src/mp4atom.cpp	2012-02-21 19:36:38.000000000 +0100
-@@ -543,6 +543,10 @@
-         m_pFile->SetPosition(m_start + 8);
-         m_pFile->WriteUInt64(m_size);
-     } else {
-+        if (!(m_size <= (uint64_t)0xFFFFFFFF)) {
-+            // Let the user know what the following assert is all about
-+            fprintf(stderr, "MP4ERROR: File size exceeded 4 GB; output unplayable. Enable \"Large file size\" to fix it.\n");
-+        }
-         ASSERT(m_size <= (uint64_t)0xFFFFFFFF);
-         m_pFile->SetPosition(m_start);
-         m_pFile->WriteUInt32(m_size);

pkgs/development/libraries/mp4v2/default.nix

@@ -9,10 +9,6 @@ stdenv.mkDerivation rec {
   };
 
   patches = [
-    # From Handbrake
-    # mp4v2 doesn't seem to be actively maintained any more :-/
-    ./A02-meaningful-4gb-warning.patch
-
     (fetchurl {
       name = "gcc-7.patch";
       url = "https://src.fedoraproject.org/cgit/rpms/libmp4v2.git/plain/"