DOCS/interface-changes.rst: simplify playback abort change description

Although it was not true at the time this was written, both the
"program" and "cache-size" are gone now.

Since the changelog is for the entire next release, it makes no sense to
mention these removed properties.

It also happens to make the description of this much simpler, because
it's a non-issue now. It's probably not even worth mentioning anymore.

DOCS/interface-changes.rst

@@ -76,17 +76,8 @@ Interface changes
       dropped: `cache`, `cache-size`, `cache-free`, `cache-used`, `--cache-default`,
       `--cache-initial`, `--cache-seek-min`, `--cache-backbuffer`, `--cache-file`,
       `--cache-file-size`
-    - remove async playback abort hack. This breaks aborting playback in the
-      following cases, iff the current stream is a network stream that
-      completely stopped responding:
-        - setting "program" property
-        - setting "cache-size" property
-      In earlier versions of mpv, the player core froze as well in these cases,
-      but could still be aborted with the quit, stop, playlist-prev,
-      playlist-next commands. If these properties are not accessed, frozen
-      network streams should not freeze the player core (only playback in
-      uncached regions), and differing behavior should be reported as a bug.
-      If --demuxer-thread=no is used, there are no guarantees.
+    - remove async playback abort hack. This may make it impossible to abort
+      playback if --demuxer-thread=no is forced.
     - remove `--macos-title-bar-style`, replaced by `--macos-title-bar-material`
       and `--macos-title-bar-appearance`.
     - The default for `--vulkan-async-compute` has changed to `yes` from `no`