PyDoc: remove CSS override for scrolling long enum lists

Adding a scroll-bar to in-line lists has the down-side that it cuts
of text including warnings or notes that can be included, see: T87008.

Now enums are referenced [0] this is no longer needed, reverting [1].

[0]: 1c6b66c9cf
[1]: 1e8f266591

doc/python_api/static/css/theme_overrides.css

@@ -1,10 +1,3 @@
-/* T76453: Prevent Long enum lists */
-.field-list > dd p {
-   max-height: 245px;
-   overflow-y: auto !important;
-   word-break: break-word;
-}
-
 /* Hide home icon in search area */
 .wy-side-nav-search > a:hover {background: none; opacity: 0.9}
 .wy-side-nav-search > a.icon::before {content: none}