liblog: remove stderr logger

There are no users of the liblog stderr logger, but 66 users of
android::base::StderrLogger.  We'll prefer that format and work to
merge it into liblog.

Test: liblog-unit-tests
Change-Id: Ifad24b27ac0f51379b925f6644caa1f6f3d9ad81
diff --git a/liblog/logger_write.cpp b/liblog/logger_write.cpp
index aef9e04..7fc8747 100644
--- a/liblog/logger_write.cpp
+++ b/liblog/logger_write.cpp
@@ -586,9 +586,9 @@
     return retval;
   }
 
-  __android_log_transport &= LOGGER_LOGD | LOGGER_STDERR;
+  __android_log_transport &= LOGGER_LOGD;
 
-  transport_flag &= LOGGER_LOGD | LOGGER_STDERR;
+  transport_flag &= LOGGER_LOGD;
 
   if (__android_log_transport != transport_flag) {
     __android_log_transport = transport_flag;
@@ -614,7 +614,7 @@
   if (write_to_log == __write_to_log_null) {
     ret = LOGGER_NULL;
   } else {
-    __android_log_transport &= LOGGER_LOGD | LOGGER_STDERR;
+    __android_log_transport &= LOGGER_LOGD;
     ret = __android_log_transport;
     if ((write_to_log != __write_to_log_init) && (write_to_log != __write_to_log_daemon)) {
       ret = -EINVAL;