Remove square brackets from bibliography list

Question

I have seen that BibLaTeX bibliography without square brackets provides an answer to how to remove square brackets in this example. However, I do not know from that answer where those adjustments can be made because I do not have any of the commands this post cites.

I wish to remove the square brackets and the numbers from the bibliography list as seen in the picture. Moreover, I wish to remove the indentation that comes through this numbering.

I have tried as kindly suggested to use \makeatletter \renewcommand(...) as seen in the comment section but that did not change anything. Perhaps, it needs addressing where to put the individual command.

I am using as bibliography style the file ecta.bst which is available here: http://mirrors.ctan.org/biblio/bibtex/contrib/economic/ecta.bst .

I am using the natbib package which is required for the ecta.bst bibliography style.

Here is a test document that is standalone save the .bib file which I am also providing in an abbreviated version.

I am trying to achieve the following:

I wish to remove the square-bracketed numbering from the bibliography altogether, which, as I was kindly told includes removing the indentation as well. So I just wish to have the last names in an alphabetically ordered list.

Thank you so much!

See for .tex file below and below that the content of the bibo.bib file.

\documentclass[aps,superscriptaddress,nofootinbib]{revtex4}

\usepackage[latin9]{inputenc}

\setcounter{secnumdepth}{3}

\usepackage{mathtools}

\usepackage{natbib}

\makeatletter

\special{papersize=\the\paperwidth,\the\paperheight}

%% Because html converters don't know tabularnewline
\providecommand{\tabularnewline}{\\}

\newcommand\mycite[1]{% with Numbers 
\citeauthor{#1}~(\citeyear{#1})\@
}
%%%%%Here is the command to be tried out.
\renewcommand\@biblabel[1]{}
%%%%%%%%%%%%End of Jerome's custom area
\makeatother

\begin{document}

\vspace{0.6cm}

\title{Test Document}

\author{Me}

%
\date{2 December, 2014}
%

\maketitle

\section{Testing Citations}

As he said, \mycite{ECTA:ECTA438}, we need to be clear on testing. Also, \mycite{RefWorks:14} will play a role. When we now add \mycite{RefWorks:12}.

\section{Introduction}

Hello Intro.

\bibliographystyle{ecta}

\bibliography{bibo}{}

\end{document}

WITH BIBLIOGRAPHY FILE:

@article{RefWorks:12,
    Abstract = {Abstract.},
    Author = {Sophocles Mavroeidis and Mikkel Plagborg-M{\o}ller and James H. Stock},
    Date-Modified = {2015-01-14 22:54:50 +0000},
    Journal = {Journal of Economic Literature},
    Number = {1},
    Pages = {124-188},
    Title = {Empirical evidence on inflation expectations in the New Keynesian Phillips Curve},
    Volume = {52},
    Year = {2014}
}
@article{RefWorks:14,
    Abstract = {Abstract.},
    Author = {Kang Yong Tan and David Vines},
    Date-Modified = {2015-01-15 13:45:29 +0000},
    Journal = {Available at SSRN 1026339},
    Title = {Woodford goes to Africa},
    Year = {2007}}
@article{ECTA:ECTA438,
    Abstract = {Abstract},
    Author = {Moreira, Marcelo J.},
    Date-Added = {2015-01-14 22:57:58 +0000},
    Date-Modified = {2015-01-14 22:57:58 +0000},
    Doi = {10.1111/1468-0262.00438},
    Issn = {1468-0262},
    Journal = {Econometrica},
    Keywords = {Instruments, similar tests, Wald test, score test, likelihood ratio test, confidence regions, 2SLS estimator, LIML estimator},
    Number = {4},
    Pages = {1027--1048},
    Publisher = {Blackwell Publishing Ltd},
    Title = {A Conditional Likelihood Ratio Test for Structural Models},
    Url = {http://dx.doi.org/10.1111/1468-0262.00438},
    Volume = {71},
    Year = {2003}}