file_sys/nca_patch: Remove unnecessary includes

romfs.h doesn't need to be included in the header, the only real
dependency here is common's swap.h that needs to be included.

src/core/file_sys/nca_patch.cpp

@@ -2,6 +2,10 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <algorithm>
+#include <cstddef>
+#include <cstring>
+
 #include "common/assert.h"
 #include "core/crypto/aes_util.h"
 #include "core/file_sys/nca_patch.h"