How to get rid of empty space

Question

I'm just started using LaTeX, and I ran into a problem: The text starts way down in the page, so there is a lot of empty room. How do I move the text upwards?

Code:

\documentclass{report}
\usepackage[utf8]{inputenc}
\usepackage[norsk]{babel}
\usepackage{titlesec}
\usepackage{graphicx}    

\title{THT310}
\author{Eivind Hagen}  

\titleformat{\chapter}[display]
  {\Huge\bfseries}
  {}
  {0pt}
  {\thechapter.\ }

\titleformat{name=\chapter,numberless}[display]
  {\Huge\bfseries}
  {}
  {0pt}
  {}    

\begin{document}
\begin{titlepage}
\maketitle
\end{titlepage}

\tableofcontents
\newpage    

\chapter{Introduksjon}
\input{kapittel1}
\chapter{del 2}
\input{kapittel2}    

\end{document}