Remove CaptainThrowback as maintainer

- I no longer have (or have never had) these devices and
  no longer want the responsibility of maintenance

Change-Id: Ic3c776b726d624ab84f95016351f4ae43ba693bb
diff --git a/_htc/htcuultra.markdown b/_htc/htcuultra.markdown
index 20256d9..19adf08 100644
--- a/_htc/htcuultra.markdown
+++ b/_htc/htcuultra.markdown
@@ -4,7 +4,7 @@
 codename: oce
 downloadfolder: oce
 supportstatus: Current
-maintainer: CaptainThrowback
+maintainer: None
 oem: HTC
 ddof: "/dev/block/bootdevice/by-name/recovery"
 devicetree: "https://github.com/TeamWin/android_device_htc_oce"