fastboot: remove reference of deprecated make_ext4 code

Bug: 64395169
Change-Id: Ida14996dc1488657e7bdeb34d6e767a8f6ed44ed
diff --git a/fastboot/Android.mk b/fastboot/Android.mk
index dd8bad9..bc88002 100644
--- a/fastboot/Android.mk
+++ b/fastboot/Android.mk
@@ -58,7 +58,6 @@
 
 LOCAL_STATIC_LIBRARIES := \
     libziparchive \
-    libext4_utils \
     libsparse \
     libutils \
     liblog \
diff --git a/fastboot/fs.cpp b/fastboot/fs.cpp
index 709f061..8006beb 100644
--- a/fastboot/fs.cpp
+++ b/fastboot/fs.cpp
@@ -23,7 +23,6 @@
 #include <android-base/file.h>
 #include <android-base/stringprintf.h>
 #include <android-base/unique_fd.h>
-#include <ext4_utils/make_ext4fs.h>
 #include <sparse/sparse.h>
 
 using android::base::StringPrintf;