Drop the liblightningjni link, creating it in CI instead

[ldk-java] / liblightningjni.so

diff --git a/liblightningjni.so b/liblightningjni.so
deleted file mode 120000 (symlink)
index 1b6bb88..0000000
--- a/liblightningjni.so
+++ /dev/null
@@ -1 +0,0 @@
-liblightningjni_release.so
\ No newline at end of file