Fix patches/pinmame/0004: drop duplicate hunk conflicting with 0002

0004 was generated via a plain `git diff` against pinmame's pristine
commit, which captured the *cumulative* diff for cpuexec.c - including
patch 0002's time_fence stub hunk, not just 0004's own new cpu_run
splitting code. Applying 0002 then 0004 in sequence (exactly what
setup.sh does) failed: 0004's duplicate hunk expected pre-0002 context
that no longer matched.

Regenerated by diffing the current tree against a baseline with 0001-0003
already applied (matching the vpinball/0006 patch's existing approach)
instead of against pristine directly. Verified: all 4 pinmame patches now
apply cleanly in sequence against a fresh pristine checkout, and the
result is byte-identical to the working tree that was actually built and
tested.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SoSarxLgY33Kax5UNXcafZ

patches/pinmame/0004-emscripten-cooperative-scheduling.patch

@@ -1,5 +1,5 @@
 diff --git a/src/cpuexec.c b/src/cpuexec.c
-index ca7401f..0bfcbe7 100644
+index 07db6a1..0bfcbe7 100644
 --- a/src/cpuexec.c
 +++ b/src/cpuexec.c
 @@ -466,6 +466,65 @@ void cpu_run(void)
@@ -68,41 +68,6 @@ index ca7401f..0bfcbe7 100644
  
  
  /*************************************
-@@ -943,6 +1002,34 @@ void time_fence_exit()
- 	}
- }
- 
-+#elif defined(__EMSCRIPTEN__)
-+
-+// No cross-thread wait primitive is used here: this build is single-threaded
-+// (see vpinball-wasm's README on why pthreads/SharedArrayBuffer are out of
-+// scope), and time_fence is purely an *optional* external-clock-sync feature
-+// (mirrored by Controller.TimeFence in controller.vbs) - reporting it as
-+// unsupported just means the emulator paces itself on its own internal
-+// timing instead of syncing to the host's clock, which is what every other
-+// platform this library runs on outside of this fence do anyway.
-+int time_fence_is_supported()
-+{
-+	return 0;
-+}
-+
-+void time_fence_post()
-+{
-+}
-+
-+int time_fence_wait(double secs)
-+{
-+	(void)secs;
-+	return 0;
-+}
-+
-+void time_fence_exit()
-+{
-+}
-+
- #else
- 
- #include <semaphore.h>
 diff --git a/src/libpinmame/libpinmame.cpp b/src/libpinmame/libpinmame.cpp
 index 6966d77..755d762 100644
 --- a/src/libpinmame/libpinmame.cpp