Aggregate all liquidity restrictions in a single place (#1921)

* Clean up session key rotation

* Fix build

* Bump version

* Introduce feature to balances.

* Move staking locking logic over to central point

* ^^^ rest

* First part of assimilation

* More assimilation

* More assimilation

* Fix most tests

* Fix build

* Move Balances to new locking system

* :q!

* Bump runtime version

* Build runtime

* Convenience function

* Test fix.

* Whitespace

* Improve type legibility.

* Fix comment.

* More tests.

* More tests.

* Bump version

* Caps

* Whitespace

* Whitespace

* Remove unneeded function.

substrate/core/trie/src/node_header.rs

@@ -72,7 +72,6 @@ impl Decode for NodeHeader {
 
 			BRANCH_NODE_NO_VALUE => NodeHeader::Branch(false),		// 254
 			BRANCH_NODE_WITH_VALUE => NodeHeader::Branch(true),		// 255
-			_ => unreachable!(),
 		})
 	}
 }