LibGfx: Remove the unused Bitmap::set_mmap_name()

Userland/Libraries/LibGfx/Bitmap.cpp

@@ -565,14 +565,6 @@ void Bitmap::strip_alpha_channel()
     m_format = BitmapFormat::BGRx8888;
 }
 
-void Bitmap::set_mmap_name([[maybe_unused]] ByteString const& name)
-{
-    VERIFY(m_needs_munmap);
-#ifdef AK_OS_SERENITY
-    ::set_mmap_name(m_data, size_in_bytes(), name.characters());
-#endif
-}
-
 void Bitmap::fill(Color color)
 {
     for (int y = 0; y < physical_height(); ++y) {

Userland/Libraries/LibGfx/Bitmap.h

@@ -204,8 +204,6 @@ public:
     // Call only for BGRx8888 and BGRA8888 bitmaps.
     void strip_alpha_channel();
 
-    void set_mmap_name(ByteString const&);
-
     [[nodiscard]] static constexpr size_t size_in_bytes(size_t pitch, int physical_height) { return pitch * physical_height; }
     [[nodiscard]] size_t size_in_bytes() const { return size_in_bytes(m_pitch, physical_height()); }