[MM-51274] Remove deprecated PermissionUseSlashCommands (#22819)

Co-authored-by: Mattermost Build <build@mattermost.com>

webapp/channels/src/packages/mattermost-redux/src/constants/permissions.ts

@@ -4,7 +4,6 @@
 const values = {
     INVITE_USER: 'invite_user',
     ADD_USER_TO_TEAM: 'add_user_to_team',
-    USE_SLASH_COMMANDS: 'use_slash_commands',
     MANAGE_SLASH_COMMANDS: 'manage_slash_commands',
     MANAGE_OTHERS_SLASH_COMMANDS: 'manage_others_slash_commands',
     CREATE_PUBLIC_CHANNEL: 'create_public_channel',

webapp/channels/src/utils/constants.tsx

@@ -1136,7 +1136,6 @@ export const PermissionsScope = {
     [Permissions.INVITE_USER]: 'team_scope',
     [Permissions.INVITE_GUEST]: 'team_scope',
     [Permissions.ADD_USER_TO_TEAM]: 'team_scope',
-    [Permissions.USE_SLASH_COMMANDS]: 'channel_scope',
     [Permissions.MANAGE_SLASH_COMMANDS]: 'team_scope',
     [Permissions.MANAGE_OTHERS_SLASH_COMMANDS]: 'team_scope',
     [Permissions.CREATE_PUBLIC_CHANNEL]: 'team_scope',
@@ -1250,7 +1249,6 @@ export const DefaultRolePermissions = {
         Permissions.UPLOAD_FILE,
         Permissions.GET_PUBLIC_LINK,
         Permissions.CREATE_POST,
-        Permissions.USE_SLASH_COMMANDS,
         Permissions.MANAGE_PRIVATE_CHANNEL_MEMBERS,
         Permissions.DELETE_POST,
         Permissions.EDIT_POST,
@@ -1315,7 +1313,6 @@ export const DefaultRolePermissions = {
         Permissions.ADD_REACTION,
         Permissions.REMOVE_REACTION,
         Permissions.USE_CHANNEL_MENTIONS,
-        Permissions.USE_SLASH_COMMANDS,
         Permissions.READ_CHANNEL,
         Permissions.UPLOAD_FILE,
         Permissions.CREATE_POST,