Fix the contents of BUILD for java-tutorial (bazelbuild#101)

The current contents of the BUILD file is from a later stage in tutorial

Author: seckin206

.bazelci/presubmit.yml

@@ -121,19 +121,19 @@ tasks:
     platform: ubuntu1804
     working_directory: java-tutorial
     build_targets:
-    - "..."
+    - "//:ProjectRunner"
   java-tutorial-macos:
     name: "Java Tutorial"
     platform: macos
     working_directory: java-tutorial
     build_targets:
-    - "..."
+    - "//:ProjectRunner"
   java-tutorial-windows:
     name: "Java Tutorial"
     platform: windows
     working_directory: java-tutorial
     build_targets:
-    - "..."
+    - "//:ProjectRunner"
   rules-linux:
     name: "Bazel Rules"
     platform: ubuntu1804

java-tutorial/BUILD

@@ -1,11 +1,4 @@
 java_binary(
     name = "ProjectRunner",
-    srcs = glob(["src/main/java/com/example/ProjectRunner.java"]),
-    deps = [":greeter"],
-)
-
-java_library(
-    name = "greeter",
-    srcs = ["src/main/java/com/example/Greeting.java"],
-    visibility = ["//src/main/java/com/example/cmdline:__pkg__"],
+    srcs = glob(["src/main/java/com/example/*.java"]),
 )