Revert "Added checkbox for cluster attribute (#810)"

This reverts commit 393f4a38b9.

src/components/ModalSources.jsx

@@ -128,7 +128,6 @@ class AddSource extends React.Component {
       }
       case 'geojson_json': return {
         type: 'geojson',
-        cluster: source.cluster || false,
         data: {}
       }
       case 'tilejson_vector': return {

src/components/ModalSourcesTypeEditor.jsx

@@ -8,7 +8,6 @@ import FieldSelect from './FieldSelect'
 import FieldDynamicArray from './FieldDynamicArray'
 import FieldArray from './FieldArray'
 import FieldJson from './FieldJson'
-import FieldCheckbox from './FieldCheckbox'
 
 
 class TileJSONSourceEditor extends React.Component {
@@ -206,8 +205,7 @@ class GeoJSONSourceFieldJsonEditor extends React.Component {
   }
 
   render() {
-    return <div>
-      <Block label={"GeoJSON"} fieldSpec={latest.source_geojson.data}>
+    return <Block label={"GeoJSON"} fieldSpec={latest.source_geojson.data}>
       <FieldJson
         layer={this.props.source.data}
         maxHeight={200}
@@ -224,17 +222,6 @@ class GeoJSONSourceFieldJsonEditor extends React.Component {
         }}
       />
     </Block>
-      <FieldCheckbox
-        label={'Cluster'}
-        value={this.props.source.cluster}
-        onChange={cluster => {
-          this.props.onChange({
-            ...this.props.source,
-            cluster: cluster,
-          })
-        }}
-      />
-    </div>
   }
 }