removing old xml nearby chat

indra/newview/skins/default/xui/en/floater_nearby_chat.xml

-<?xml version="1.0" encoding="utf-8" standalone="yes"?>
-<floater
- border_visible="false"
- border="false"
- legacy_header_height="18"
- can_minimize="true"
- can_tear_off="false"
- can_resize="true"
- can_drag_on_left="false"
- can_close="false"
- can_dock="true"
- bevel_style="in"
- height="300"
- min_width="235"
- layout="topleft"
- name="nearby_chat"
- help_topic="nearby_chat"
- save_rect="true"
- title="NEARBY CHAT"
- save_dock_state="true"
- save_visibility="true"
- single_instance="true"
- width="320">
-            <check_box
-             bottom_delta="36"
-             control_name="TranslateChat"
-             enabled="true"
-             height="16"
-             label="Translate chat (powered by Google)"
-             layout="topleft"
-             left="5"
-             name="translate_chat_checkbox"
-             width="230" />
-  <chat_history
-    parse_urls="true"
-    bg_readonly_color="ChatHistoryBgColor"
-    bg_writeable_color="ChatHistoryBgColor"
-    follows="all"
-    left="5"
-    top_delta="17"
-    layout="topleft"
-    height="260"
-    name="chat_history"
-    parse_highlights="true"
-    text_color="ChatHistoryTextColor"
-    text_readonly_color="ChatHistoryTextColor"
-    right_widget_pad="5"
-    left_widget_pad="0"
-    width="315" />
-</floater>