remove icons, fixes #3376

Closes #3376

Merge request studip/studip!2298

public/assets/images/icons/blue/contrast.svg

-<?xml version="1.0" encoding="UTF-8"?>
-<svg id="Ebene_2" data-name="Ebene 2" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
-  <defs>
-    <style>
-      .cls-1 {
-        fill: none;
-      }
-
-      .cls-1, .cls-2 {
-        stroke-width: 0px;
-      }
-
-      .cls-2 {
-        fill: #28497c;
-      }
-    </style>
-  </defs>
-  <g id="Viewbox_64x64" data-name="Viewbox 64x64">
-    <rect class="cls-1" width="64" height="64"/>
-  </g>
-  <g id="accessability">
-    <g id="contrast">
-      <g>
-        <path class="cls-2" d="m32.49,14.02c-.16,0-.32-.02-.48-.02h0s0,0-.01,0c-9.94,0-18,8.06-18,18s8.06,18,18,18,18-8.06,18-18-7.8-17.71-17.51-17.98Zm-.49,29.98c-6.62,0-12-5.38-12-12s5.38-12,12-12c0,0,0,0,.01,0v24s-.01,0-.01,0Z"/>
-        <circle class="cls-2" cx="32" cy="7" r="3"/>
-        <circle class="cls-2" cx="32" cy="57" r="3"/>
-        <circle class="cls-2" cx="7" cy="32" r="3"/>
-        <circle class="cls-2" cx="57" cy="32" r="3"/>
-        <circle class="cls-2" cx="14.32" cy="14.32" r="3"/>
-        <circle class="cls-2" cx="49.68" cy="49.68" r="3"/>
-        <circle class="cls-2" cx="14.32" cy="49.68" r="3"/>
-        <circle class="cls-2" cx="49.68" cy="14.32" r="3"/>
-      </g>
-    </g>
-  </g>
-</svg>
\ No newline at end of file

public/assets/images/icons/blue/easy-read.svg

-<?xml version="1.0" encoding="UTF-8"?>
-<svg id="Ebene_2" data-name="Ebene 2" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
-  <defs>
-    <style>
-      .cls-1 {
-        fill: none;
-      }
-
-      .cls-1, .cls-2 {
-        stroke-width: 0px;
-      }
-
-      .cls-2 {
-        fill: #28497c;
-      }
-    </style>
-  </defs>
-  <g id="Viewbox_64x64" data-name="Viewbox 64x64">
-    <rect class="cls-1" width="64" height="64"/>
-  </g>
-  <g id="accessability">
-    <g id="easy-read">
-      <g>
-        <polygon class="cls-2" points="29.66 44.87 24.51 39.71 20.48 43.77 29.66 53 43.52 39.07 39.48 35 29.66 44.87"/>
-        <path class="cls-2" d="m32.06,28c6.65,0,12-5.36,12-12s-5.36-12-12-12-12,5.37-12,12,5.38,12,12,12Zm0-18c3.31,0,6,2.69,6,6s-2.69,6-6,6-6-2.69-6-6,2.69-6,6-6Z"/>
-        <path class="cls-2" d="m58,43c0-2.46-1.23-4.57-3-5.5v-11.5l-23,4.01-23-4.01v11.5c-1.77.93-3,3.04-3,5.5s1.23,4.57,3,5.5v7.49l23,4.01,23-4v-7.5c1.77-.93,3-3.04,3-5.5Zm-26,12.94l-19-3.31v-4.13c1.77-.93,3-3.04,3-5.5s-1.23-4.57-3-5.5v-6.75l18.31,3.19.69.12.69-.12,18.31-3.19v6.75c-1.77.93-3,3.04-3,5.5s1.23,4.57,3,5.5v4.14l-19,3.3Z"/>
-      </g>
-    </g>
-  </g>
-</svg>
\ No newline at end of file

public/assets/images/icons/blue/easy-read2.svg

-<?xml version="1.0" encoding="UTF-8"?>
-<svg id="Ebene_2" data-name="Ebene 2" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
-  <defs>
-    <style>
-      .cls-1 {
-        fill: none;
-      }
-
-      .cls-1, .cls-2 {
-        stroke-width: 0px;
-      }
-
-      .cls-2 {
-        fill: #28497c;
-      }
-    </style>
-  </defs>
-  <g id="Viewbox_64x64" data-name="Viewbox 64x64">
-    <rect class="cls-1" width="64" height="64"/>
-  </g>
-  <g id="accessability">
-    <g id="easy-read2">
-      <g>
-        <path class="cls-2" d="m32.06,28c6.65,0,12-5.36,12-12s-5.36-12-12-12-12,5.37-12,12,5.38,12,12,12Z"/>
-        <path class="cls-2" d="m55,37.5v-11.5l-23,4.01-23-4.01v11.5c-1.77.93-3,3.04-3,5.5s1.23,4.57,3,5.5v7.49l23,4.01,23-4v-7.5c1.77-.93,3-3.04,3-5.5s-1.23-4.57-3-5.5Zm-25.34,15.5l-9.18-9.23,4.03-4.06,5.14,5.16,9.82-9.87,4.04,4.07-13.86,13.93Z"/>
-      </g>
-    </g>
-  </g>
-</svg>
\ No newline at end of file