fix(examples): bump gazelle in examples/build_file_generation (#1421)

This PR fixes some broken examples in `examples/build_file_generation` –
because `gazelle` needed to be updated.

After this PR, `bazel run //:requirements.update && bazel run
//:gazelle_python_manifest.update && bazel run //:gazelle` no runs.
Moreover if you delete the autogenerated sections of the `BUILD.bazel`
file, it will regenerate them.

Fixes #1372

examples/build_file_generation/WORKSPACE

diff --git a/examples/build_file_generation/WORKSPACE b/examples/build_file_generation/WORKSPACE
index 03085d8..a743644 100644
--- a/examples/build_file_generation/WORKSPACE
+++ b/examples/build_file_generation/WORKSPACE
@@ -28,13 +28,12 @@
 )
 
 # Download the bazel_gazelle ruleset.
-
 http_archive(
     name = "bazel_gazelle",
-    sha256 = "727f3e4edd96ea20c29e8c2ca9e8d2af724d8c7778e7923a854b2c80952bc405",
+    sha256 = "d3fa66a39028e97d76f9e2db8f1b0c11c099e8e01bf363a923074784e451f809",
     urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/bazel-gazelle/releases/download/v0.30.0/bazel-gazelle-v0.30.0.tar.gz",
-        "https://github.com/bazelbuild/bazel-gazelle/releases/download/v0.30.0/bazel-gazelle-v0.30.0.tar.gz",
+        "https://mirror.bazel.build/github.com/bazelbuild/bazel-gazelle/releases/download/v0.33.0/bazel-gazelle-v0.33.0.tar.gz",
+        "https://github.com/bazelbuild/bazel-gazelle/releases/download/v0.33.0/bazel-gazelle-v0.33.0.tar.gz",
     ],
 )
 

examples/build_file_generation/random_number_generator/BUILD.bazel

diff --git a/examples/build_file_generation/random_number_generator/BUILD.bazel b/examples/build_file_generation/random_number_generator/BUILD.bazel
index 95e16fd..28370b4 100644
--- a/examples/build_file_generation/random_number_generator/BUILD.bazel
+++ b/examples/build_file_generation/random_number_generator/BUILD.bazel
@@ -6,14 +6,12 @@
         "__init__.py",
         "generate_random_number.py",
     ],
-    imports = [".."],
     visibility = ["//:__subpackages__"],
 )
 
 py_test(
     name = "random_number_generator_test",
     srcs = ["__test__.py"],
-    imports = [".."],
     main = "__test__.py",
     deps = [":random_number_generator"],
 )