Remove license based on token information

[markwilson]

• [x] Correct license removal logic
• [x] Remove license text
• [x] Ensure license removal also removes new lines
• [x] Ensure opening PHP tag is not suffixed with an unwanted space

[markwilson]

@jameshalsall This is working now, can you give it a test?

[jameshalsall]

Awesome :)