Remove java/native module

The JNI bindings are only used by TruffleRuby, so there's no real
value in publishing them to Maven. This avoids us being blocked on
figuring out a reliable way to build and publish native artifacts
to Maven, something that has never really had a good answer.

Instead, we will push the "api" and "wasm" modules for now for
JRuby's internal parser use, and prepare to push a second "wasm"
module to be used by the gem (with full non-semantic data). The
remaining artifacts will be the FFI-based gem (opt-in for JRuby
users and built at install time) and the raw native library (bound
by JRuby using JNR or Panama and to be built and installed by a
JRuby-specific gem a la jruby-prism-parser.

Author: headius

java/native/pom.xml

@@ -50,7 +50,6 @@
 
   <modules>
     <module>api</module>
-    <module>native</module>
     <module>wasm</module>
   </modules>