Remove unused plugin update command / redux action

Summary:
This command is never actually dispatched so removing to avoid future confusion.

When new plugins are downloaded a check is done here https://fburl.com/code/e3zedljb to see if pluginIsDisabledForAllConnectedClients, if so, load command is queued, which internally calls update (which resets state)

If the plugin is not disabled then a message appears asking user to manually reload.

Reviewed By: aigoncharov

Differential Revision: D44502476

fbshipit-source-id: b796b77f843218c07ee612d9f45cacba073362d3

desktop/flipper-ui-core/src/dispatcher/pluginManager.tsx

@@ -140,9 +140,6 @@ async function processPluginCommandsQueue(
         case 'UNINSTALL_PLUGIN':
           uninstallPlugin(store, command.payload);
           break;
-        case 'UPDATE_PLUGIN':
-          updatePlugin(store, command.payload);
-          break;
         case 'SWITCH_PLUGIN':
           switchPlugin(store, command.payload);
           break;

desktop/flipper-ui-core/src/reducers/pluginManager.tsx

@@ -19,7 +19,6 @@ export type State = {
 export type PluginCommand =
   | LoadPluginAction
   | UninstallPluginAction
-  | UpdatePluginAction
   | SwitchPluginAction;
 
 export type LoadPluginActionPayload = {
@@ -47,11 +46,6 @@ export type UpdatePluginActionPayload = {
   enablePlugin: boolean;
 };
 
-export type UpdatePluginAction = {
-  type: 'UPDATE_PLUGIN';
-  payload: UpdatePluginActionPayload;
-};
-
 export type SwitchPluginActionPayload = {
   plugin: PluginDefinition;
   selectedApp?: string;
@@ -80,7 +74,6 @@ export default function reducer(
   switch (action.type) {
     case 'LOAD_PLUGIN':
     case 'UNINSTALL_PLUGIN':
-    case 'UPDATE_PLUGIN':
     case 'SWITCH_PLUGIN':
       return produce(state, (draft) => {
         draft.pluginCommandsQueue.push(action);
@@ -111,13 +104,6 @@ export const pluginCommandsProcessed = (payload: number): Action => ({
   payload,
 });
 
-export const registerPluginUpdate = (
-  payload: UpdatePluginActionPayload,
-): Action => ({
-  type: 'UPDATE_PLUGIN',
-  payload,
-});
-
 export const switchPlugin = (payload: SwitchPluginActionPayload): Action => ({
   type: 'SWITCH_PLUGIN',
   payload,