Kernel/Devices: Remove required_mode and device_name methods

These methods are no longer needed because SystemServer is able to
populate the DevFS on its own.

Device absolute_path no longer assume a path to the /dev location,
because it really should not assume any path to a Device node.

Because StorageManagement still needs to know the storage name, we
declare a virtual method only for StorageDevices to override, but this
technique should really be removed later on.

Kernel/TTY/MasterPTY.cpp

@@ -130,9 +130,4 @@ String MasterPTY::absolute_path(const OpenFileDescription&) const
     return String::formatted("ptm:{}", m_pts_name);
 }
 
-String MasterPTY::device_name() const
-{
-    return String::formatted("{}", minor());
-}
-
 }

Kernel/TTY/MasterPTY.h

@@ -28,10 +28,6 @@ public:
 
     virtual String absolute_path(const OpenFileDescription&) const override;
 
-    // ^Device
-    virtual mode_t required_mode() const override { return 0640; }
-    virtual String device_name() const override;
-
 private:
     explicit MasterPTY(unsigned index, NonnullOwnPtr<DoubleBuffer> buffer);
     // ^CharacterDevice

Kernel/TTY/PTYMultiplexer.h

@@ -35,10 +35,6 @@ public:
 
     void notify_master_destroyed(Badge<MasterPTY>, unsigned index);
 
-    // ^Device
-    virtual mode_t required_mode() const override { return 0666; }
-    virtual String device_name() const override { return "ptmx"; }
-
 private:
     // ^CharacterDevice
     virtual StringView class_name() const override { return "PTYMultiplexer"; }

Kernel/TTY/SlavePTY.cpp

@@ -107,11 +107,6 @@ KResult SlavePTY::close()
     return KSuccess;
 }
 
-String SlavePTY::device_name() const
-{
-    return String::formatted("{}", minor());
-}
-
 FileBlockerSet& SlavePTY::blocker_set()
 {
     return m_master->blocker_set();

Kernel/TTY/SlavePTY.h

@@ -38,9 +38,6 @@ private:
     virtual StringView class_name() const override { return "SlavePTY"; }
     virtual KResult close() override;
 
-    // ^Device
-    virtual String device_name() const override;
-
     friend class MasterPTY;
     SlavePTY(MasterPTY&, unsigned index);
 

Kernel/TTY/TTY.h

@@ -49,9 +49,6 @@ public:
     void set_default_termios();
     void hang_up();
 
-    // ^Device
-    virtual mode_t required_mode() const override { return 0620; }
-
 protected:
     virtual KResultOr<size_t> on_tty_write(const UserOrKernelBuffer&, size_t) = 0;
     void set_size(unsigned short columns, unsigned short rows);

Kernel/TTY/VirtualConsole.cpp

@@ -359,11 +359,6 @@ void VirtualConsole::set_cursor_style(VT::CursorStyle)
     // Do nothing
 }
 
-String VirtualConsole::device_name() const
-{
-    return String::formatted("tty{}", minor());
-}
-
 void VirtualConsole::echo(u8 ch)
 {
     m_console_impl.on_input(ch);

Kernel/TTY/VirtualConsole.h

@@ -107,9 +107,6 @@ private:
     // ^CharacterDevice
     virtual StringView class_name() const override { return "VirtualConsole"; }
 
-    // ^Device
-    virtual String device_name() const override;
-
     void set_active(bool);
     void flush_dirty_lines();