Remove the coin amount from state layer solution

[Rigidity]

Purpose:

Removes the coin amount (typically 1) from the end of the NFT state layer (referred to here as "metadata" layer) solution. The actual puzzle's solution does not contain more than one argument, the inner solution.

The way it is now increases the cost slightly, and breaks code which expects an exact format for the solution. That said, code which does can likely be relaxed a bit to adapt to this.

[Yakuhito]

LGTM

[coveralls-official]

Pull Request Test Coverage Report for Build 10465812450

Details

• 3 of 3 (100.0%) changed or added relevant lines in 1 file are covered.
• 6 unchanged lines in 4 files lost coverage.
• Overall coverage increased (+0.04%) to 90.872%

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Files with Coverage Reduction	New Missed Lines	%
chia/wallet/wallet_node.py	1	89.01%
chia/daemon/client.py	1	73.94%
chia/server/server.py	2	82.21%
chia/server/ws_connection.py	2	88.69%

Totals
Change from base Build 10461877247:	0.04%
Covered Lines:	101367
Relevant Lines:	111524

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💛 - Coveralls

[Quexington]

This seems fine, I would imagine the amount was necessary in a previous iteration and we simply forgot to update the drivers when we iterated.