remove legacy stuff (#519)

* remove legacy stuff

* fix typo

* respond to review

README.md

@@ -28,8 +28,6 @@ streamlit run promptsource/app.py -- -r
 ```
 
 ## Contributing
-Join the **Hackaprompt** and help writing templates!
-
 Contribution guidelines and step-by-step *HOW TO* are described [here](CONTRIBUTING.md).
 
 ## Writing Templates
@@ -49,9 +47,6 @@ Is this a piece of news regarding {{"world politics"}}, {{"sports"}}, {{"busines
 
 For more information, read the [Contribution guidelines](CONTRIBUTING.md).
 
-## Other documentation
-- Experimental context: [Experiment D](https://docs.google.com/document/d/1ar9cTRs9ZWxMkW-_9jF1ZtfY-u8IK_sO5QOtq1qnC2I/edit?usp=sharing)
-- Prompting interface: [design doc](https://docs.google.com/document/d/1IQzrrAAMPS0XAn_ArOq2hyEDCVfeB7AfcvLUqgSnWxQ/)
 ## Known Issues
 
 **Warning or Error about Darwin on OS X:** Try downgrading PyArrow to 3.0.0.

promptsource/app.py

@@ -109,8 +109,8 @@ def show_text(t, width=WIDTH):
 if mode == "Helicopter view":
     st.title("High level metrics")
     st.write(
-        "If you want to take ownership for prompting a specific dataset, "
-        + "put your name in [this spreadsheet](https://docs.google.com/spreadsheets/d/10SBt96nXutB49H52PV2Lvne7F1NvVr_WZLXD8_Z0JMw/edit?usp=sharing)."
+        "If you want to contribute, please refer to the instructions in "
+        + "[Contributing](https://github.com/bigscience-workshop/promptsource/blob/main/CONTRIBUTING.md)."
     )
 
     #