Linear norm confidence score is unreliable

@dakshvar22: Let me see if I can share a bigger list of intents and paraphrases here but in the meantime here are a few examples:

- intent: make payment
  examples:
  - I want to make a payment today
  - Can you help me make a payment?

- intent: payment extension
  examples:
  - I wanted to check if I can extent my payment 
  - can you check if I am eligible for a payment extension

- intent: payment arrangement
  examples:
  - I want to make a payment arrangement
  - Can you help me schedule a payment

These are very similar intents based on the paraphrases but at the same time i cannot combine them because they actually represent very different use cases.