Revert "Merge pull request #2348 from matrix-org/bwindels/roomgridview-experimental"

This reverts commit ece5cb1fcc, reversing
changes made to 64a3d2521c.

res/img/feather-icons/toggle-right-panel.svg

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<svg width="22px" height="14px" viewBox="0 0 22 14" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
-    <!-- Generator: Sketch 52.5 (67469) - http://www.bohemiancoding.com/sketch -->
-    <title>Group 2</title>
-    <desc>Created with Sketch.</desc>
-    <g id="Experiments" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd" stroke-linecap="round">
-        <g id="multi-room-test-copy-8" transform="translate(-826.000000, -15.000000)" stroke="#929EB4" stroke-width="1.6">
-            <g id="Group-4" transform="translate(341.000000, 7.000000)">
-                <g id="Group-2" transform="translate(486.000000, 8.000000)">
-                    <path d="M20,1 L2.30926389e-14,1" id="Line-10"></path>
-                    <path d="M20,7 L3,7" id="Line-10-Copy"></path>
-                    <path d="M20,13 L6,13" id="Line-10-Copy-2"></path>
-                </g>
-            </g>
-        </g>
-    </g>
-</svg>