remove packages from preamble

preamble.tex

@@ -3,26 +3,23 @@
 \usepackage{wasysym} % for circly Maths symbols
 \usepackage{epsdice} % for dice symbols
 \usepackage{appendix}
-\usepackage{geometry}
-\usepackage{array}
+\usepackage{geometry} % changes page borders
 \usepackage{svg}
 \usepackage{alltt}
-\svgsetup{width=\textwidth}
+	\svgsetup{width=\textwidth}
 \usepackage{tabularx}
 \usepackage{wrapfig}
 \usepackage{float}
-\usepackage{epigraph}
+\usepackage{epigraph} % part quotes
 \usepackage{makeidx}
 \usepackage[english]{babel}
 \usepackage{multicol}
 \usepackage{graphicx}
-\usepackage{incgraph}
 \usepackage{etoolbox}
-\usepackage{float}
 \usepackage{titlesec}
 \usepackage{needspace}
 \usepackage{tikz}
-\usetikzlibrary{mindmap,trees}
+	\usetikzlibrary{mindmap,trees}
 \usepackage{pifont}
 \usepackage{colortbl}
 \usepackage[poster]{tcolorbox}