update default.xml.

default.xml

@@ -96,7 +96,6 @@
   <project name="third_party_libjpeg" path="third_party/libjpeg"/>
   <project name="third_party_libpng" path="third_party/libpng"/>
   <project name="third_party_libuuid" path="third_party/libuuid"/>
-  <project name="third_party_littlefs" path="third_party/littlefs"/>
   <project name="third_party_ltp" path="third_party/ltp"/>
   <project name="third_party_lwip" path="third_party/lwip"/>
   <project name="third_party_mbedtls" path="third_party/mbedtls"/>