Delete references to the Debian-bundled Python

We should now be able to use the rules_python version for everything.
There's no need to keep the old stuff around.

Signed-off-by: Philipp Schrader <philipp.schrader@gmail.com>
Change-Id: I75b1764d1d98c17832bfd0146c958db96d54ae48
diff --git a/third_party/matplotlib-cpp/BUILD b/third_party/matplotlib-cpp/BUILD
index bd10366..431a403 100644
--- a/third_party/matplotlib-cpp/BUILD
+++ b/third_party/matplotlib-cpp/BUILD
@@ -5,28 +5,18 @@
     hdrs = [
         "matplotlibcpp.h",
     ],
-    data = select({
-        "//tools/platforms/python:debian_bundled_python": [
-            "@matplotlib_repo//:matplotlib3",
-        ],
-        "//tools/platforms/python:upstream_bundled_python": [
-            "@pip//matplotlib",
-            "@pip//pygobject",
-        ],
-    }) + [
+    data = [
         "//third_party/python:python_runtime",
+        "@pip//matplotlib",
+        "@pip//pygobject",
     ],
     # While this is technically compatible with "linux", the
     # "@python_repo//:all_files" has x86 binaries in it.
     target_compatible_with = ["@platforms//cpu:x86_64"],
     visibility = ["//visibility:public"],
-    deps = select({
-        "//tools/platforms/python:debian_bundled_python": [],
-        "//tools/platforms/python:upstream_bundled_python": [
-            "//third_party/python:numpy_cc",
-        ],
-    }) + [
+    deps = [
         "//third_party/python",
+        "//third_party/python:numpy_cc",
     ],
 )