Kernel: Remove empty Ext2FSInode::one_ref_left()

Kernel/FileSystem/Ext2FileSystem.cpp

@@ -1553,11 +1553,6 @@ ErrorOr<NonnullRefPtr<Inode>> Ext2FSInode::lookup(StringView name)
     return fs().get_inode({ fsid(), inode_index });
 }
 
-void Ext2FSInode::one_ref_left()
-{
-    // FIXME: I would like to not live forever, but uncached Ext2FS is fucking painful right now.
-}
-
 ErrorOr<void> Ext2FSInode::set_atime(time_t t)
 {
     MutexLocker locker(m_inode_lock);

Kernel/FileSystem/Ext2FileSystem.h

@@ -33,9 +33,6 @@ public:
     bool is_symlink() const { return Kernel::is_symlink(m_raw_inode.i_mode); }
     bool is_directory() const { return Kernel::is_directory(m_raw_inode.i_mode); }
 
-    // ^Inode (RefCounted magic)
-    virtual void one_ref_left() override;
-
 private:
     // ^Inode
     virtual ErrorOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override;