adb doesn't actually use libzipfile.

Change-Id: Ia7d22214bc8422c88edaaf9bb716d7e12e0bb381
diff --git a/Android.mk b/Android.mk
index 1749c62..8171611 100644
--- a/Android.mk
+++ b/Android.mk
@@ -155,7 +155,6 @@
 
 LOCAL_STATIC_LIBRARIES := \
     libadb \
-    libzipfile \
     libcrypto_static \
     $(EXTRA_STATIC_LIBS) \
 
diff --git a/adb_client.cpp b/adb_client.cpp
index d677db8..a485aa2 100644
--- a/adb_client.cpp
+++ b/adb_client.cpp
@@ -28,7 +28,6 @@
 #define  TRACE_TAG  TRACE_ADB
 #include "adb_client.h"
 #include "adb_io.h"
-#include "zipfile/zipfile.h"
 
 static transport_type __adb_transport = kTransportAny;
 static const char* __adb_serial = NULL;
diff --git a/file_sync_client.cpp b/file_sync_client.cpp
index 8ce4ee2..4ba730b 100644
--- a/file_sync_client.cpp
+++ b/file_sync_client.cpp
@@ -32,7 +32,6 @@
 #include "adb_client.h"
 #include "adb_io.h"
 #include "file_sync_service.h"
-#include "zipfile/zipfile.h"
 
 static unsigned long long total_bytes;
 static long long start_time;