remove-xgboost-build (#12822)

Signed-off-by: Richard Liaw <rliaw@berkeley.edu>

python/ray/util/xgboost/BUILD

@@ -2,25 +2,25 @@
 # Tests from the python/ray/util/sgd/tests directory.
 # Please keep these sorted alphabetically.
 # --------------------------------------------------------------------
-py_test(
-    name = "simple_example",
-    size = "small",
-    srcs = ["simple_example.py"],
-    deps = [":xgb_lib"],
-    tags = ["exclusive"],
-)
+# py_test(
+#     name = "simple_example",
+#     size = "small",
+#     srcs = ["simple_example.py"],
+#     deps = [":xgb_lib"],
+#     tags = ["exclusive"],
+# )
 
-py_test(
-    name = "simple_tune",
-    size="small",
-    srcs = ["simple_tune.py"],
-    deps = [":xgb_lib"],
-    tags = ["exlcusive"]
-)
+# py_test(
+#     name = "simple_tune",
+#     size="small",
+#     srcs = ["simple_tune.py"],
+#     deps = [":xgb_lib"],
+#     tags = ["exlcusive"]
+# )
 
-# This is a dummy test dependency that causes the above tests to be
-# re-run if any of these files changes.
-py_library(
-    name = "xgb_lib",
-    srcs = glob(["**/*.py"], exclude=["tests/*.py"]),
-)
+# # This is a dummy test dependency that causes the above tests to be
+# # re-run if any of these files changes.
+# py_library(
+#     name = "xgb_lib",
+#     srcs = glob(["**/*.py"], exclude=["tests/*.py"]),
+# )