Everywhere: Remove klog(), dbg() and purge all LogStream usage :^)

Good-bye LogStream. Long live AK::Format!

Userland/Shell/main.cpp

@@ -24,16 +24,17 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "Execution.h"
 #include "Shell.h"
 #include <LibCore/ArgsParser.h>
 #include <LibCore/Event.h>
 #include <LibCore/EventLoop.h>
 #include <LibCore/File.h>
+#include <errno.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 RefPtr<Line::Editor> editor;
 Shell::Shell* s_shell;