delete unity props

Author: Suri539

dita/RTC-NG/API/rtc_api_overview_ng.dita

@@ -1034,7 +1034,7 @@
                 <stentry>方法</stentry>
                 <stentry>描述</stentry>
             </sthead>
-            <strow props="flutter rn electron unity">
+            <strow props="flutter rn electron">
                 <stentry><xref keyref="startEchoTest2"/></stentry>
                 <stentry><ph conkeyref="startEchoTest2/shortdesc"/></stentry>
             </strow>

dita/RTC-NG/RTC_NG_API_Unity.ditamap

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE map PUBLIC "-//OASIS//DTD DITA Map//EN" "map.dtd">
 <map>
-    <title>Unity API Reference </title>
+    <title>Agora Unity API Reference </title>
     <topicmeta>
         <navtitle>Unity API Reference</navtitle>
     </topicmeta>