Remove unused Java package

Java is not required anymore so remove unused package

BUG: 25281898
diff --git a/default.xml b/default.xml
index 5bbc066..c9771a2 100644
--- a/default.xml
+++ b/default.xml
@@ -47,7 +47,6 @@
   <project path="external/avahi" name="platform/external/avahi" groups="bdk" />
   <project path="external/bison" name="platform/external/bison" groups="pdk,bdk" />
   <project path="external/boringssl" name="platform/external/boringssl" groups="pdk,bdk" />
-  <project path="external/bouncycastle" name="platform/external/bouncycastle" groups="pdk,bdk" />
   <project path="external/bsdiff" name="platform/external/bsdiff" groups="pdk,bdk" />
   <project path="external/bzip2" name="platform/external/bzip2" groups="pdk,bdk" />
   <project path="external/c-ares" name="platform/external/c-ares" groups="bdk" />