I want to remove the number of the title. In the picture you can find the problem as visually: sample

Is it possible? Thank you.

My MWE is below:


    author = "Albert Einstein",
    title = "{Zur Elektrodynamik bewegter K{\"o}rper}. ({German})
    [{On} the electrodynamics of moving bodies]",
    journal = "Annalen der Physik",
    volume = "322",
    number = "10",
    pages = "891--921",
    year = "1905",
    DOI = "http://dx.doi.org/10.1002/andp.19053221004",
    keywords = "physics"

    title = {The Principles of Quantum Mechanics},
    author = {Paul Adrien Maurice Dirac},
    isbn = {9780198520115},
    series = {International series of monographs on physics},
    year = {1981},
    publisher = {Clarendon Press},
    keywords = {physics}

    author = "Donald Knuth",
    title = "Knuth: Computers and Typesetting",
    url  = "http://www-cs-faculty.stanford.edu/~uno/abcde.html",
    addendum = "(accessed: 01.09.2016)",
    keywords = "latex,knuth"



% Customize headings
\newcommand*{\myonehalfvspace}{20.775861pt}% <-- Define a macro \myonehalfvspace

% Chapter heading \titlespacing*{command}{left}{before-sep}{after-sep}[right-sep]
\titlespacing{\chapter}{1cm}{0cm plus 4pt minus 2pt}{\myonehalfvspace plus 2pt minus 2pt}

\bibliographystyle{plainnat} % or some other suitable bib style


\usepackage[spaces,obeyspaces,hyphens]{xurl} % allow arbitrary line breaks in URL strings



Chapter name and the first line of the paragraph is aligned here \cite{einstein}, \cite{dirac}, \cite{knuthwebsite}.

Chapter 2 content.


Chapter 4 content.


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