Revert "Implement 'fastboot format' command"

until Windows support is done

This reverts commit 452e11885afb53d59b2aa38b15e3be41c568d1e6.
diff --git a/fastboot/Android.mk b/fastboot/Android.mk
index 8c130ff..3c5538f 100644
--- a/fastboot/Android.mk
+++ b/fastboot/Android.mk
@@ -16,9 +16,8 @@
 
 include $(CLEAR_VARS)
 
-LOCAL_C_INCLUDES := $(LOCAL_PATH)/../mkbootimg \
-  $(LOCAL_PATH)/../../extras/ext4_utils
-LOCAL_SRC_FILES := protocol.c engine.c bootimg.c fastboot.c
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/../mkbootimg
+LOCAL_SRC_FILES := protocol.c engine.c bootimg.c fastboot.c 
 LOCAL_MODULE := fastboot
 
 ifeq ($(HOST_OS),linux)
@@ -48,7 +47,7 @@
   LOCAL_C_INCLUDES += development/host/windows/usb/api
 endif
 
-LOCAL_STATIC_LIBRARIES := $(EXTRA_STATIC_LIBS) libzipfile libunz libext4_utils libz
+LOCAL_STATIC_LIBRARIES := $(EXTRA_STATIC_LIBS) libzipfile libunz
 
 include $(BUILD_HOST_EXECUTABLE)
 $(call dist-for-goals,dist_files,$(LOCAL_BUILT_MODULE))