cryptfs: remove reference to legacy make_ext4fs

Use upstream mke2fs tool to format ext4 filesystem.

Bug: 64395169
Change-Id: I383510f25a7c0935ddb280a14ef31fcbd143cba1
diff --git a/Android.mk b/Android.mk
index d0b199d..59486d9 100644
--- a/Android.mk
+++ b/Android.mk
@@ -85,14 +85,7 @@
 
 required_modules :=
 ifeq ($(TARGET_USERIMAGES_USE_EXT4), true)
-  ifeq ($(TARGET_USES_MKE2FS), true)
-    vold_cflags += -DTARGET_USES_MKE2FS
-    required_modules += mke2fs
-  else
-    # Adoptable storage has fully moved to mke2fs, so we need both tools
-    required_modules += mke2fs
-    required_modules += make_ext4fs
-  endif
+  required_modules += mke2fs
 endif
 
 include $(CLEAR_VARS)