Revert "Add yet-another-react-lightbox package and update .gitignore to exclude node_modules"

This reverts commit c92f4a5edd.

frontend/node_modules/@svgdotjs/svg.js/.config/pretest.js

@@ -0,0 +1,22 @@
+/* global XMLHttpRequest */
+'use strict'
+
+function get(uri) {
+  var xhr = new XMLHttpRequest()
+  xhr.open('GET', uri, false)
+  xhr.send()
+  if (xhr.status !== 200) {
+    console.error('SVG.js fixture could not be loaded. Tests will fail.')
+  }
+  return xhr.responseText
+}
+
+function main() {
+  var style = document.createElement('style')
+  document.head.appendChild(style)
+  style.sheet.insertRule(get('/fixtures/fixture.css'), 0)
+
+  document.body.innerHTML = get('/fixtures/fixture.svg')
+}
+
+main()