liblog: remove visibility macros

Visibility is managed through version scripts now.

Bug: 123349183
Test: build
Change-Id: Ia388611a2ec14d0ff9c3896cfe97ccdce17dbb8b
diff --git a/liblog/stderr_write.cpp b/liblog/stderr_write.cpp
index 28195aa..e324a7c 100644
--- a/liblog/stderr_write.cpp
+++ b/liblog/stderr_write.cpp
@@ -54,7 +54,7 @@
 #endif
 };
 
-LIBLOG_HIDDEN struct android_log_transport_write stderrLoggerWrite = {
+struct android_log_transport_write stderrLoggerWrite = {
     .node = {&stderrLoggerWrite.node, &stderrLoggerWrite.node},
     .context.priv = NULL,
     .name = "stderr",