[core/memory] Remove defered heap allocation on Linux.

Authored-by: weakboson <weakboson@eden-emu.dev>
Signed-off-by: lizzie <lizzie@eden-emu.dev>

src/core/memory.h

@@ -492,8 +492,6 @@ public:
 
     bool InvalidateNCE(Common::ProcessAddress vaddr, size_t size);
 
-    bool InvalidateSeparateHeap(void* fault_address);
-
 private:
     Core::System& system;