Remove/les protocol and canonical hash tree

[LukaszRozmej]

Changes

• Remove LES protocol which is obsolete and never was implemented properly
• Remove CHT
• Remove BlockTree.FindLowestCommonAncestor as it was not used

Types of changes

What types of changes does your code introduce?

• Bugfix (a non-breaking change that fixes an issue)
• New feature (a non-breaking change that adds functionality)
• Breaking change (a change that causes existing functionality not to work as expected)
• Optimization
• Refactoring
• Documentation update
• Build-related changes
• Other: Description

Testing

Requires testing

• Yes
• No

If yes, did you write tests?

• Yes
• No

Notes on testing

Optional. Remove if not applicable.

Documentation

Requires documentation update

• Yes
• No

Requires explanation in Release Notes

• Yes
• No

[benaadams]

Moar!