Remove cx-Oracle import test (#271)

`//test:cx_oracle_darwin_build_test` just ensures that cx-Oracle is
importable and defines a `__version__` attribute. The test name implies
that the build process for cx-Oracle itself - specifically on Darwin - is
what matters in this test, although it's not clear why: the test
predates Please's plugin architecture, and was inherited from the main
Please repo.

cx-Oracle has been abandoned since 2022 [1] and hasn't had a new version
published on PyPI since 2021 [2]. The final version only has pre-built
wheels available for Python <= 3.10 manylinux SOABIs, so pip has to
build it from source for the vast majority of SOABIs. It's not clear why
this is a price worth paying any more, so remove it (and the test that
depends on it).

[1] https://oracle.github.io/python-cx_Oracle/
[2] https://pypi.org/project/cx-Oracle/8.3.0/

Author: chrisnovakovic

test/BUILD

@@ -137,15 +137,6 @@ python_test(
     data = {"txt": ["data.txt"]},
 )
 
-python_test(
-    name = "cx_oracle_darwin_build_test",
-    srcs = ["cx_oracle_darwin_build_test.py"],
-    labels = [
-        "pip",
-    ],
-    deps = ["//third_party/python:cx_oracle"],
-)
-
 plugin_e2e_test(
     name = "pip_libary_zip_safe_label_test",
     repo = "zip_safe_label_repo",

test/cx_oracle_darwin_build_test.py

@@ -383,13 +383,6 @@ pip_library(
     version = "1.5",
 )
 
-pip_library(
-    name = "cx_oracle",
-    package_name = "cx-Oracle",
-    licences = ["BSD-3-Clause"],
-    version = "8.2.1",
-)
-
 pip_library(
     name = "distlib",
     licences = ["PSF-2.0"],