Revert libSceGnmDriver initialization emulation (#2816)

Under normal circumstances, this mapping should only occur when libSceGnmDriver initializes. From what I can tell, this can be after game code starts running. Until there's a better way to accurately handle this, allocating this memory breaks some games.
This revert fixes the regression in games using the GFD engine.

src/core/linker.cpp

@@ -112,18 +112,6 @@ void Linker::Execute(const std::vector<std::string> args) {
                                                                  0, "SceKernelInternalMemory");
     ASSERT_MSG(ret == 0, "Unable to perform sceKernelInternalMemory mapping");
 
-    // Simulate libSceGnmDriver initialization, which maps a chunk of direct memory.
-    // Some games fail without accurately emulating this behavior.
-    s64 phys_addr{};
-    ret = Libraries::Kernel::sceKernelAllocateDirectMemory(
-        0, Libraries::Kernel::sceKernelGetDirectMemorySize(), 0x10000, 0x10000, 3, &phys_addr);
-    if (ret == 0) {
-        void* addr{reinterpret_cast<void*>(0xfe0000000)};
-        ret = Libraries::Kernel::sceKernelMapNamedDirectMemory(&addr, 0x10000, 0x13, 0, phys_addr,
-                                                               0x10000, "SceGnmDriver");
-    }
-    ASSERT_MSG(ret == 0, "Unable to emulate libSceGnmDriver initialization");
-
     main_thread.Run([this, module, args](std::stop_token) {
         Common::SetCurrentThreadName("GAME_MainThread");
         LoadSharedLibraries();