vendor: remove old apns symlink

* This is old and if anyone's still using it, its time to stop

Change-Id: I89bf175f7f45bcc3cbd5f882528e0f7ec6cf49e4
diff --git a/prebuilt/common/etc/apns-conf-cdma.xml b/prebuilt/common/etc/apns-conf-cdma.xml
deleted file mode 120000
index 57dbe63..0000000
--- a/prebuilt/common/etc/apns-conf-cdma.xml
+++ /dev/null
@@ -1 +0,0 @@
-apns-conf.xml
\ No newline at end of file