remove commented code

Author: kolosovpetro

src/sections/01_introduction/introduction.tex

@@ -1,22 +1,4 @@
 Considering the table of forward finite differences of the polynomial $n^3$
-%\begin{table}[H]
-%    \begin{center}
-%        \setlength\extrarowheight{-6pt}
-%        \begin{tabular}{c|cccc}
-%            $n$ & $n^3$ & $\Delta(n^3)$ & $\Delta^2(n^3)$ & $\Delta^3(n^3)$ \\
-%            \hline
-%            0   & 0     & 1             & 6               & 6               \\
-%            1   & 1     & 7             & 12              & 6               \\
-%            2   & 8     & 19            & 18              & 6               \\
-%            3   & 27    & 37            & 24              & 6               \\
-%            4   & 64    & 61            & 30              & 6               \\
-%            5   & 125   & 91            & 36              &                 \\
-%            6   & 216   & 127           &                 &                 \\
-%            7   & 343   &               &                 &
-%        \end{tabular}
-%    \end{center}
-%    \caption{Table of finite differences of the polynomial $n^3$.} \label{tab:table}
-%\end{table}
 \input{figures/01_fig_finite_differences_cubes}
 We can easily observe that finite differences
 \footnote{\input{sections/01_introduction/footnote}}