Kernel: Remove Shell from kernel

This is now obsolete since we have a userspace Shell.

kernel/include/kernel/Shell.h

@@ -1,39 +0,0 @@
-#pragma once
-
-#include <BAN/String.h>
-#include <BAN/Vector.h>
-#include <kernel/Input/KeyEvent.h>
-
-namespace Kernel
-{
-
-	class Shell
-	{
-	public:
-		Shell();
-		Shell(const Shell&) = delete;
-		BAN::ErrorOr<void> set_prompt(BAN::StringView);
-		void run();
-
-	private:
-		void rerender_buffer() const;
-		BAN::Vector<BAN::String> parse_arguments(BAN::StringView) const;
-		BAN::ErrorOr<void> process_command(const BAN::Vector<BAN::String>&);
-		BAN::ErrorOr<void> update_prompt();
-
-	private:
-		BAN::Vector<BAN::String>	m_old_buffer;
-		BAN::Vector<BAN::String>	m_buffer;
-		BAN::String					m_prompt_string;
-		BAN::String					m_prompt;
-		uint32_t					m_prompt_length = 0;
-		
-		struct
-		{
-			uint32_t line = 0;
-			uint32_t col = 0;
-			uint32_t index = 0;
-		} m_cursor_pos;
-	};
-
-}