Remove online asr tutorial (#3984)

* Remove online asr tutorial

* Remove other online asr tutorials

* Remove references to asr tutorials

---------

Co-authored-by: Sam Anklesaria <[email protected]>

Author: samanklesaria

docs/source/index.rst

@@ -71,9 +71,6 @@ model implementations and application components.
    tutorials/speech_recognition_pipeline_tutorial
    tutorials/asr_inference_with_ctc_decoder_tutorial
    tutorials/asr_inference_with_cuda_ctc_decoder_tutorial
-   tutorials/online_asr_tutorial
-   tutorials/device_asr
-   tutorials/device_avsr
    tutorials/forced_alignment_tutorial
    tutorials/forced_alignment_for_multilingual_data_tutorial
    tutorials/tacotron2_pipeline_tutorial
@@ -164,13 +161,6 @@ Tutorials
    :link: tutorials/asr_inference_with_cuda_ctc_decoder_tutorial.html
    :tags: Pipelines,ASR,CTC-Decoder,CUDA-CTC-Decoder
 
-.. customcarditem::
-   :header: On device audio-visual automatic speech recognition
-   :card_description: Learn how to stream audio and video from laptop webcam and perform audio-visual automatic speech recognition using Emformer-RNNT model.
-   :image: https://download.pytorch.org/torchaudio/doc-assets/avsr/transformed.gif
-   :link: tutorials/device_avsr.html
-   :tags: I/O,Pipelines,RNNT
-
 .. customcarditem::
    :header: CTC Forced Alignment API
    :card_description: Learn how to use TorchAudio's CTC forced alignment API (<code>torchaudio.functional.forced_align</code>).
@@ -234,20 +224,6 @@ Tutorials
    :link: tutorials/asr_inference_with_ctc_decoder_tutorial.html
    :tags: Pipelines,ASR,wav2vec2,CTC-Decoder
 
-.. customcarditem::
-   :header: Online ASR with Emformer RNN-T
-   :card_description: Learn how to perform online ASR with Emformer RNN-T (<code>torchaudio.pipelines.RNNTBundle</code>) and <code>torchaudio.io.StreamReader</code>.
-   :image: https://download.pytorch.org/torchaudio/tutorial-assets/thumbnails/online_asr_tutorial.gif
-   :link: tutorials/online_asr_tutorial.html
-   :tags: Pipelines,ASR,RNNT,StreamReader
-
-.. customcarditem::
-   :header: Real-time microphone ASR with Emformer RNN-T
-   :card_description: Learn how to transcribe speech fomr microphone with Emformer RNN-T (<code>torchaudio.pipelines.RNNTBundle</code>) and <code>torchaudio.io.StreamReader</code>.
-   :image: https://download.pytorch.org/torchaudio/tutorial-assets/thumbnails/device_asr.png
-   :link: tutorials/device_asr.html
-   :tags: Pipelines,ASR,RNNT,StreamReader
-
 .. customcarditem::
    :header: Forced Alignment with Wav2Vec2
    :card_description: Learn how to align text to speech with Wav2Vec 2 (<code>torchaudio.pipelines.Wav2Vec2ASRBundle</code>).