[CLEANUP] Drop ext_icon.svg (#56)

With TYPO3 9.5, the icon file in `Resources/Public/Icons` will suffice.

CHANGELOG.md

@@ -19,6 +19,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ### Deprecated
 
 ### Removed
+- Drop ext_icon.svg (#56)
 - Stop building with the lowest Composer dependencies (#55)
 - Drop support for TYPO3 < 9.5 (#50)
 - Drop support for PHP < 7.2 (#49)

ext_icon.svg

@@ -1,119 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Generator: Adobe Illustrator 19.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
-
-<svg
-   xmlns:osb="http://www.openswatchbook.org/uri/2009/osb"
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://creativecommons.org/ns#"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:xlink="http://www.w3.org/1999/xlink"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   version="1.1"
-   id="Capa_1"
-   x="0px"
-   y="0px"
-   viewBox="0 0 457.8778 342.01929"
-   xml:space="preserve"
-   sodipodi:docname="hot-tea.svg"
-   inkscape:version="0.92.2 (5c3e80d, 2017-08-06)"
-   width="457.87781"
-   height="342.01929"><metadata
-     id="metadata988"><rdf:RDF><cc:Work
-         rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" /><dc:title></dc:title></cc:Work></rdf:RDF></metadata><defs
-     id="defs986"><linearGradient
-       id="linearGradient992"
-       osb:paint="solid"><stop
-         style="stop-color:#ff862b;stop-opacity:1;"
-         offset="0"
-         id="stop990" /></linearGradient><linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient992"
-       id="linearGradient994"
-       x1="0"
-       y1="320.008"
-       x2="480"
-       y2="320.008"
-       gradientUnits="userSpaceOnUse" /><linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient992"
-       id="linearGradient996"
-       gradientUnits="userSpaceOnUse"
-       x1="0"
-       y1="320.008"
-       x2="480"
-       y2="320.008" /><linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient992"
-       id="linearGradient998"
-       gradientUnits="userSpaceOnUse"
-       x1="0"
-       y1="320.008"
-       x2="480"
-       y2="320.008" /></defs><sodipodi:namedview
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1"
-     objecttolerance="10"
-     gridtolerance="10"
-     guidetolerance="10"
-     inkscape:pageopacity="0"
-     inkscape:pageshadow="2"
-     inkscape:window-width="1600"
-     inkscape:window-height="1140"
-     id="namedview984"
-     showgrid="false"
-     inkscape:zoom="1.94375"
-     inkscape:cx="240"
-     inkscape:cy="102.02732"
-     inkscape:window-x="0"
-     inkscape:window-y="0"
-     inkscape:window-maximized="1"
-     inkscape:current-layer="g931"
-     fit-margin-top="0"
-     fit-margin-left="0"
-     fit-margin-right="0"
-     fit-margin-bottom="0" /><g
-     id="g933"
-     transform="matrix(0.95391211,0,0,1.187567,0,-209.02129)"
-     style="fill:url(#linearGradient994);fill-opacity:1"><g
-       id="g931"
-       style="fill:url(#linearGradient998);fill-opacity:1"><path
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-         id="path929"
-         inkscape:connector-curvature="0"
-         style="fill:url(#linearGradient996);fill-opacity:1"
-         sodipodi:nodetypes="scssssssscscsscscscssc" /></g></g><g
-     id="g953"
-     transform="translate(0,-176.00801)" /><g
-     id="g955"
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-     id="g981"
-     transform="translate(0,-176.00801)" /></svg>