docs: update README

Author: Yukaii

README.md

@@ -1,15 +1,3 @@
-## We will fix HackMD VSCode extension logging-in issue
-
-Users have been unable to log in to the VSCode extension. We apologize for your hampered workflow.
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-The logging-in of our VSCode extension broke since we've introduced several measures into the logging-in flow to ward off bot registrations and other spam. 
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-We will fix this in 2～3 weeks. Instead of email and password, you will use an API token for logging in to the extension in the future.
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-We could have avoided this issue and have learned a lesson. We apologize for the inconvenience you might experience.
-
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 # The official HackMD Markdown VSCode extension
 
 Use the same [HackMD](https://hackmd.io) markdown right in VSCode!