Remove Java support on Windows

Author: yhori991

recipe/build-core.bat

@@ -27,11 +27,6 @@ echo %CONDA_PREFIX%
 python -c "import os; print('\n'.join(os.environ['PATH'].split(';')))"
 echo ----------
 
-echo ==========================================================
-echo build java bindings
-echo ==========================================================
-bazel build //java:ray_java_pkg
-
 echo ==========================================================
 echo calling pip to install
 echo ==========================================================

recipe/meta.yaml

@@ -84,9 +84,9 @@ outputs:
         - python
         - setproctitle >=1.2.2,<1.4
         - cross-python_{{ target_platform }}     # [build_platform != target_platform]
-        - openjdk =11
-        - maven
-        - unzip
+        - openjdk =11  # [not win]
+        - maven  # [not win]
+        - unzip   # [not win]
       host:
         - python
         - pip