Kernel/LibC: Rework TIOC{G,S}WINSZ more linux like

Userspace can freely set terminal size, kernel just updates it when for
example new font is loaded. Also SIGWINCH is now sent by kernel instead
of userspace.

kernel/kernel/Terminal/PseudoTerminal.cpp

@@ -204,20 +204,4 @@ namespace Kernel
 		return master->m_buffer_size < master->m_buffer->size();
 	}
 
-	BAN::ErrorOr<long> PseudoTerminalSlave::ioctl_impl(int request, void* argument)
-	{
-		switch (request)
-		{
-			case TIOCSWINSZ:
-			{
-				const auto* winsize = static_cast<struct winsize*>(argument);
-				m_width = winsize->ws_col;
-				m_height = winsize->ws_row;
-				return 0;
-			}
-		}
-
-		return TTY::ioctl_impl(request, argument);
-	}
-
 }