liblog: remove visibility macros

Visibility is managed through version scripts now.

Bug: 123349183
Test: build
Change-Id: Ia388611a2ec14d0ff9c3896cfe97ccdce17dbb8b
diff --git a/liblog/fake_writer.cpp b/liblog/fake_writer.cpp
index 46d171b..c0b0e69 100644
--- a/liblog/fake_writer.cpp
+++ b/liblog/fake_writer.cpp
@@ -31,7 +31,7 @@
 
 static int logFds[(int)LOG_ID_MAX] = {-1, -1, -1, -1, -1, -1};
 
-LIBLOG_HIDDEN struct android_log_transport_write fakeLoggerWrite = {
+struct android_log_transport_write fakeLoggerWrite = {
     .node = {&fakeLoggerWrite.node, &fakeLoggerWrite.node},
     .context.priv = &logFds,
     .name = "fake",