liblog: remove fake_log_device

This is now dead code as __android_log_stderr_logger() has superseded it.

Bug: 147496863
Test: build
Change-Id: Ibdea2961ec4fc093bf9e35581dc1c46db2cff06a
diff --git a/liblog/logprint.cpp b/liblog/logprint.cpp
index 0745a1e..e32878a 100644
--- a/liblog/logprint.cpp
+++ b/liblog/logprint.cpp
@@ -1520,12 +1520,7 @@
  * This code is Android specific, bionic guarantees that
  * calls to non-reentrant getpwuid() are thread safe.
  */
-#if !defined(__MINGW32__)
-#if (FAKE_LOG_DEVICE == 0)
-#ifndef __BIONIC__
-#warning "This code assumes that getpwuid is thread safe, only true with Bionic!"
-#endif
-#endif
+#ifdef __ANDROID__
       struct passwd* pwd = getpwuid(entry->uid);
       if (pwd && (strlen(pwd->pw_name) <= 5)) {
         snprintf(uid, sizeof(uid), "%5s:", pwd->pw_name);