frontend: remove duplicate zoom control, fix position

Signed-off-by: Nicolas Froger <nicolas@kektus.xyz>

summer2024-frontend/src/views/MapView.vue

@@ -37,7 +37,6 @@ onMounted(() => {
         <ol-source-osm />
       </ol-tile-layer>
       <ol-scaleline-control />
-      <ol-zoom-control zoomInLabel="+" zoomOutLabel="-" />
 
       <ol-overlay
         v-for="post in postStore.posts" :key="post.id"
@@ -82,7 +81,4 @@ onMounted(() => {
 </template>
 
 <style scoped>
-.ol-zoom {
-  top: 70px !important;
-}
 </style>