Remove outdated Java doc and run demo code in CI (#10698)

Resolve Conflicts:
        java/tutorial/pom.xml
        java/tutorial/pom_template.xml

java/BUILD.bazel

@@ -13,7 +13,6 @@ all_modules = [
     "api",
     "runtime",
     "test",
-    "tutorial",
 ]
 
 java_import(
@@ -89,15 +88,6 @@ define_java_module(
     ],
 )
 
-define_java_module(
-    name = "tutorial",
-    deps = [
-        ":io_ray_ray_api",
-        ":io_ray_ray_runtime",
-        "@maven//:com_google_guava_guava",
-    ],
-)
-
 define_java_module(
     name = "test",
     deps = [
@@ -231,7 +221,6 @@ genrule(
         WORK_DIR="$$(pwd)"
         cp -f $(location //java:io_ray_ray_api_pom) "$$WORK_DIR/java/api/pom.xml"
         cp -f $(location //java:io_ray_ray_runtime_pom) "$$WORK_DIR/java/runtime/pom.xml"
-        cp -f $(location //java:io_ray_ray_tutorial_pom) "$$WORK_DIR/java/tutorial/pom.xml"
         cp -f $(location //java:io_ray_ray_test_pom) "$$WORK_DIR/java/test/pom.xml"
         date > $@
     """,