如何删除表格单元格内图形下方的空白？

Question

\documentclass[12pt,twoside]{report}

\usepackage{geometry}
\geometry{a4paper,asymmetric,
top=3.5cm,left=2cm,right=1.8cm,bottom=1cm,
headsep=0pt,footskip=0pt,
headheight=200pt}


\usepackage{array}
\usepackage[english]{babel}

\usepackage{colortbl}
\setlength\arrayrulewidth{0.5pt}\arrayrulecolor[rgb]{0.36, 0.54, 0.66}

\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhf{}

\usepackage{tikz}
\usepackage{tikz-dependency}
\usetikzlibrary{arrows.meta}
\usetikzlibrary{fit}

\usepackage{tabularx}
\usepackage{xcolor}

% Edit Commands
\def\arraystretch{0} % Row
\def\bigskip{\vspace{0.5cm}}
\setlength{\parindent}{0em}
\setlength{\tabcolsep}{0pt} % Column
\pagenumbering{gobble}
\renewcommand{\headrulewidth}{0pt}

\newcommand{\head}[1]{\includegraphics[width=0.15\textwidth]{#1}}
\newcommand{\arr}[2]{\definecolor{color}{RGB}{#1}\tikz{\path[draw=color, line width=1mm, line join=round, line cap=round, -{Straight Barb[scale=1.5, line join=round, line cap=round]},rotate=#2-45] (0,0) -- (0.7,0.7);}}
\newcommand{\zero}{\centerline{\tikz{\node[circle, fill=gray, minimum size=0.4\linewidth] {};}}}
\newcommand{\goal}[1]{\includegraphics[height=1.5cm,valign=t]{#1}}

\begin{document}

\begin{minipage}[t]{0.55\linewidth} 
    \centering 
    \begin{tabularx}{0.99\linewidth}{|*{6}{>{\centering\arraybackslash}X|}} 
        \hline \zero & \arr{234,107,20}{0} & \arr{191,143,0}{45} & \arr{84,130,53}{90} & \arr{234,107,20}{0} & \arr{191,143,0}{45} \\ 
        \hline \arr{234,107,20}{0} & \arr{234,107,20}{0} & \arr{191,143,0}{45} & \arr{84,130,53}{90} & \arr{234,107,20}{0} & \arr{191,143,0}{45} \\ 
        \hline 
    \end{tabularx}
\end{minipage}
\end{document}