Move default AllocatePages/FreePages impl from Unix to PlatformBase

Source/Engine/Platform/Unix/UnixPlatform.cpp

@@ -51,20 +51,6 @@ void UnixPlatform::Free(void* ptr)
     }
 }
 
-void* UnixPlatform::AllocatePages(uint64 numPages, uint64 pageSize)
-{
-    const uint64 numBytes = numPages * pageSize;
-
-    // Fallback to malloc
-    return malloc(numBytes);
-}
-
-void UnixPlatform::FreePages(void* ptr)
-{
-    // Fallback to free
-    free(ptr);
-}
-
 uint64 UnixPlatform::GetCurrentProcessId()
 {
     return getpid();

Source/Engine/Platform/Unix/UnixPlatform.h

@@ -16,8 +16,6 @@ public:
     // [PlatformBase]
     static void* Allocate(uint64 size, uint64 alignment);
     static void Free(void* ptr);
-    static void* AllocatePages(uint64 numPages, uint64 pageSize);
-    static void FreePages(void* ptr);
     static uint64 GetCurrentProcessId();
 };