Remove some #ifdef HAVE_ANDROID_OS that were needed for the simulator build

Change-Id: I13d9f251f86c05ae5405f37adbf6b8e9660935ba
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/core/jni/android_net_TrafficStats.cpp b/core/jni/android_net_TrafficStats.cpp
index d54981e..c22b071 100644
--- a/core/jni/android_net_TrafficStats.cpp
+++ b/core/jni/android_net_TrafficStats.cpp
@@ -44,7 +44,6 @@
 
 // Returns an ASCII decimal number read from the specified file, -1 on error.
 static jlong readNumber(char const* filename) {
-#ifdef HAVE_ANDROID_OS
     char buf[80];
     int fd = open(filename, O_RDONLY);
     if (fd < 0) {
@@ -62,9 +61,6 @@
     close(fd);
     buf[len] = '\0';
     return atoll(buf);
-#else  // Simulator
-    return -1;
-#endif
 }
 
 static const char* mobile_iface_list[] = {
@@ -101,7 +97,6 @@
 // Returns the sum of numbers from the specified path under /sys/class/net/*,
 // -1 if no such file exists.
 static jlong readTotal(char const* suffix) {
-#ifdef HAVE_ANDROID_OS
     char filename[PATH_MAX] = "/sys/class/net/";
     DIR *dir = opendir(filename);
     if (dir == NULL) {
@@ -123,9 +118,6 @@
 
     closedir(dir);
     return total;
-#else  // Simulator
-    return -1;
-#endif
 }
 
 // Mobile stats get accessed a lot more often than total stats.