Remove receive time from performance overlay

It is superseded by network latency

app/src/main/res/values-zh-rTW/strings.xml

@@ -76,7 +76,6 @@
     <string name="perf_overlay_incomingfps">網路接收幀數： %1$.2f FPS</string>
     <string name="perf_overlay_renderingfps">渲染幀數： %1$.2f FPS</string>
     <string name="perf_overlay_netdrops">網路丟失幀： %1$.2f%%</string>
-    <string name="perf_overlay_recvtime">平均接收時間： %1$.2f ms</string>
     <string name="perf_overlay_dectime">平均解碼時間： %1$.2f ms</string>
     <!-- AppList activity -->
     <string name="applist_connect_msg"> 正在連接電腦…… </string>