Get rid of immutablejs

Summary:
Changelog: 'flipper' package no longer uses or exposes immutablejs, or ManagedTable_Immutable

ImmutableJS was used in a few places, requires some specific knowledge to use optimally (e.g. batching was used nowhere), but most importantly resulted in a lot of unmaintained code duplication in terms of ManagedTable_immutable and the searchable variant.

For the planned trace export speedups this means that there is also serialization case less to worry about.

Reviewed By: jknoxville

Differential Revision: D29265677

fbshipit-source-id: 92e86081c03fb8da59d2c9f975f04a05e275c317

desktop/app/src/index.tsx

@@ -67,7 +67,6 @@ export {default as Popover} from './ui/components/Popover';
 export {
   TableColumns,
   TableRows,
-  TableRows_immutable,
   TableBodyColumn,
   TableBodyRow,
   TableHighlightedRows,
@@ -81,10 +80,6 @@ export {
   ManagedTable as ManagedTableClass,
 } from './ui/components/table/ManagedTable';
 export {ManagedTableProps} from './ui/components/table/ManagedTable';
-export {
-  default as ManagedTable_immutable,
-  ManagedTableProps_immutable,
-} from './ui/components/table/ManagedTable_immutable';
 export {
   DataValueExtractor,
   DataInspectorExpanded,
@@ -165,7 +160,6 @@ export {
   default as SearchableTable,
   filterRowsFactory,
 } from './ui/components/searchable/SearchableTable';
-export {default as SearchableTable_immutable} from './ui/components/searchable/SearchableTable_immutable';
 export {
   ElementsInspector,
   ElementsInspectorElement as Element,