ie11 fixes [deploy pr]

Author: wpears

src/api.js

@@ -105,7 +105,7 @@ function getCSV(url, name){
   a.setAttribute('download', name)
   document.body.appendChild(a)
   a.click()
-  a.remove()
+  document.body.removeChild(a)
   a = null
 }
 

src/geo/Geography.jsx

@@ -89,7 +89,7 @@ class Geography extends Component {
       else {
         for(let j=0; j<selected.length; j++){
           if(selected[j].value === options[i].value){
-            selected = [selected.slice(0,j), selected.slice(j+1)].flat()
+            selected = selected.slice(0,j).concat(selected.slice(j+1))
             break
           } else if (j === selected.length - 1){
             trimmed.push(options[i])
@@ -178,9 +178,6 @@ class Geography extends Component {
       })
     }
 
-    states = [...new Set(states)]
-    msamds = [...new Set(msamds)]
-
     return this.setStateAndRoute({
       states,
       msamds,