diff --git a/pandas/_testing/_random.py b/pandas/_testing/_random.py
index 52e5d5f58b01f..7cfd92efb5d5f 100644
--- a/pandas/_testing/_random.py
+++ b/pandas/_testing/_random.py
@@ -5,10 +5,6 @@
 from pandas._typing import NpDtype
 
 RANDS_CHARS = np.array(list(string.ascii_letters + string.digits), dtype=(np.str_, 1))
-RANDU_CHARS = np.array(
-    list("".join(map(chr, range(1488, 1488 + 26))) + string.digits),
-    dtype=(np.unicode_, 1),
-)
 
 
 def rands_array(nchars, size, dtype: NpDtype = "O", replace: bool = True) -> np.ndarray:
diff --git a/pandas/tests/io/formats/test_format.py b/pandas/tests/io/formats/test_format.py
index 70a2fc7dcc9dd..75aa9fb253bbc 100644
--- a/pandas/tests/io/formats/test_format.py
+++ b/pandas/tests/io/formats/test_format.py
@@ -3461,7 +3461,6 @@ def test_filepath_or_buffer_arg(
         assert_filepath_or_buffer_equals(expected)
 
 
-@pytest.mark.filterwarnings("ignore::FutureWarning")
 @pytest.mark.parametrize("method", ["to_string", "to_html", "to_latex"])
 def test_filepath_or_buffer_bad_arg_raises(float_frame, method):
     if method in ["to_latex"]:  # uses styler implementation
diff --git a/pandas/util/_print_versions.py b/pandas/util/_print_versions.py
index 91d518d1ab496..2526fafe5851f 100644
--- a/pandas/util/_print_versions.py
+++ b/pandas/util/_print_versions.py
@@ -132,29 +132,3 @@ def show_versions(as_json: str | bool = False) -> None:
         print("")
         for k, v in deps.items():
             print(f"{k:<{maxlen}}: {v}")
-
-
-def main() -> int:
-    from optparse import OptionParser
-
-    parser = OptionParser()
-    parser.add_option(
-        "-j",
-        "--json",
-        metavar="FILE",
-        nargs=1,
-        help="Save output as JSON into file, pass in '-' to output to stdout",
-    )
-
-    (options, args) = parser.parse_args()
-
-    if options.json == "-":
-        options.json = True
-
-    show_versions(as_json=options.json)
-
-    return 0
-
-
-if __name__ == "__main__":
-    sys.exit(main())