[cleanup] Remove RTSP and MMS support (#17030)

Authored by: seproDev

README.md

@@ -245,7 +245,6 @@ The following provide support for impersonating browser requests. This may be re
 ### Deprecated
 
 * [**rtmpdump**](http://rtmpdump.mplayerhq.hu) - For downloading `rtmp` streams. ffmpeg can be used instead with `--downloader ffmpeg`. Licensed under [GPLv2+](http://rtmpdump.mplayerhq.hu)
-* [**mplayer**](http://mplayerhq.hu/design7/info.html) or [**mpv**](https://mpv.io) - For downloading `rstp`/`mms` streams. ffmpeg can be used instead with `--downloader ffmpeg`. Licensed under [GPLv2+](https://github.com/mpv-player/mpv/blob/master/Copyright)
 
 To use or redistribute the dependencies, you must agree to their respective licensing terms.
 
@@ -625,16 +624,16 @@ Tip: Use `CTRL`+`F` (or `Command`+`F`)  to search by keywords
                                     "*10:15-inf" --download-sections "intro"
     --downloader [PROTO:]NAME       Name or path of the external downloader to
                                     use (optionally) prefixed by the protocols
-                                    (http, ftp, m3u8, dash, rstp, rtmp, mms) to
-                                    use it for. Currently supports native,
-                                    aria2c, axel, curl, ffmpeg, httpie, wget.
-                                    You can use this option multiple times to
-                                    set different downloaders for different
-                                    protocols. E.g. --downloader aria2c
-                                    --downloader "dash,m3u8:native" will use
-                                    aria2c for http/ftp downloads, and the
-                                    native downloader for dash/m3u8 downloads
-                                    (Alias: --external-downloader)
+                                    (http, ftp, m3u8, dash, rtmp) to use it for.
+                                    Currently supports native, aria2c, axel,
+                                    curl, ffmpeg, httpie, wget. You can use this
+                                    option multiple times to set different
+                                    downloaders for different protocols. E.g.
+                                    --downloader aria2c --downloader
+                                    "dash,m3u8:native" will use aria2c for
+                                    http/ftp downloads, and the native
+                                    downloader for dash/m3u8 downloads (Alias:
+                                    --external-downloader)
     --downloader-args NAME:ARGS     Give these arguments to the external
                                     downloader. Specify the downloader name and
                                     the arguments separated by a colon ":". For
@@ -1587,7 +1586,7 @@ Also filtering work for comparisons `=` (equals), `^=` (starts with), `$=` (ends
  - `acodec`: Name of the audio codec in use
  - `vcodec`: Name of the video codec in use
  - `container`: Name of the container format
- - `protocol`: The protocol that will be used for the actual download, lower-case (`http`, `https`, `rtsp`, `rtmp`, `rtmpe`, `mms`, `f4m`, `ism`, `http_dash_segments`, `m3u8`, or `m3u8_native`)
+ - `protocol`: The protocol that will be used for the actual download, lower-case (`http`, `https`, `rtmp`, `rtmpe`, `f4m`, `ism`, `http_dash_segments`, `m3u8`, or `m3u8_native`)
  - `language`: Language code
  - `dynamic_range`: The dynamic range of the video
  - `format_id`: A short description of the format
@@ -1615,7 +1614,7 @@ The available fields are:
  - `lang`: The language preference as determined by the extractor (e.g. original language preferred over audio description)
  - `quality`: The quality of the format
  - `source`: The preference of the source
- - `proto`: Protocol used for download (`https`/`ftps` > `http`/`ftp` > `m3u8_native`/`m3u8` > `http_dash_segments`> `websocket_frag` > `mms`/`rtsp` > `f4f`/`f4m`)
+ - `proto`: Protocol used for download (`https`/`ftps` > `http`/`ftp` > `m3u8_native`/`m3u8` > `http_dash_segments`> `websocket_frag` > `f4f`/`f4m`)
  - `vcodec`: Video Codec (`av01` > `vp9.2` > `vp9` > `h265` > `h264` > `vp8` > `h263` > `theora` > other)
  - `acodec`: Audio Codec (`flac`/`alac` > `wav`/`aiff` > `opus` > `vorbis` > `aac` > `mp4a` > `mp3` > `ac4` > `eac3` > `ac3` > `dts` > other)
  - `codec`: Equivalent to `vcodec,acodec`