Remove deprecated /edits endpoint

Author: alexrudall

README.md

@@ -470,22 +470,6 @@ puts response["choices"].map { |c| c["text"] }
 # => [", there lived a great"]
 ```
 
-### Edits
-
-Send a string and some instructions for what to do to the string:
-
-```ruby
-response = client.edits(
-    parameters: {
-        model: "text-davinci-edit-001",
-        input: "What day of the wek is it?",
-        instruction: "Fix the spelling mistakes"
-    }
-)
-puts response.dig("choices", 0, "text")
-# => What day of the week is it?
-```
-
 ### Embeddings
 
 You can use the embeddings endpoint to get a vector of numbers representing an input. You can then compare these vectors for different inputs to efficiently check how similar the inputs are.