removing link command

github_redefinitions.tex

@@ -1,6 +1,5 @@
 \renewcommand{\gls}[1]{#1}
 \renewcommand{\todo}[1]{TODO: \textbf{#1}}
-\renewcommand{\link}[1]{\href{#1}{#1}}
 \renewcommand{\epigraph}[2]{\textbf{#1} - \textbf{#2}}
 \renewcommand{\keyword}[1]{\texttt{#1}}
 \renewenvironment{proof}{\\ \textbf{(Optional) Proof:} \\}{\\ \textbf{(Optional) ■} \\}

introc/crash_course_introduction_to_c.tex

@@ -30,7 +30,7 @@ int main(void) {
 	\item \keyword{return 0}.
     \keyword{main} has to return an integer.
     By convention, \keyword{return 0} means success and anything else means failure.
-    Here are some exit codes / statuses with special meaning: \link{http://tldp.org/LDP/abs/html/exitcodes.html}.
+    Here are some exit codes / statuses with special meaning: \url{http://tldp.org/LDP/abs/html/exitcodes.html}.
     In general, assume 0 means success.
 \end{enumerate}