JSON: don't print deprecated amount fields any more

A small change in one routine creates a lot of changes!  We actually
recommended moving away from these in v0.7.0 (2019-02-28), but never
deprecated them formally.

Changelog-Deprecated: JSON-RPC: `pay`, `decode`, `decodepay`, `getroute`, `listinvoices`, `listpays` and `listsendpays` `msatoshi` fields (use `amount_msat`).
Changelog-Deprecated: JSON-RPC: `getinfo` `msatoshi_fees_collected` field (use `fees_collected_msat`).
Changelog-Deprecated: JSON-RPC: `listpeers` `channels`: `msatoshi_to_us`, `msatoshi_to_us_min`, `msatoshi_to_us_max`, `msatoshi_total`, `dust_limit_satoshis`, `our_channel_reserve_satoshis`, `their_channel_reserve_satoshis`, `spendable_msatoshi`, `receivable_msatoshi`, `in_msatoshi_offered`, `in_msatoshi_fulfilled`, `out_msatoshi_offered`, `out_msatoshi_fulfilled`, `max_htlc_value_in_flight_msat` and `htlc_minimum_msat` (use `to_us_msat`, `min_to_us_msat`, `max_to_us_msat`, `total_msat`, `dust_limit_msat`, `our_reserve_msat`, `their_reserve_msat`, `spendable_msat`, `receivable_msat`, `in_offered_msat`, `in_fulfilled_msat`, `out_offered_msat`, `out_fulfilled_msat`, `max_total_htlc_in_msat` and `minimum_htlc_in_msat`).
Changelog-Deprecated: JSON-RPC: `listinvoices` and `pay` `msatoshi_received` and `msatoshi_sent` (use `amount_received_msat`, `amount_sent_msat`)
Changelog-Deprecated: JSON-RPC: `listpays` and `listsendpays` `msatoshi_sent` (use `amount_sent_msat`)
Changelog-Deprecated: JSON-RPC: `listforwards` `in_msatoshi`, `out_msatoshi` and `fee` (use `in_msat`, `out_msat` and `fee_msat`)
Changelog-Deprecated: JSON-RPC: `listfunds` `outputs` `value` (use `amount_msat`)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

doc/lightning-listfunds.7.md

@@ -68,4 +68,4 @@ RESOURCES
 
 Main web site: <https://github.com/ElementsProject/lightning>
 
-[comment]: # ( SHA256STAMP:e2b4f817ca6032ab4421fccaba226c03e0995c8dbfbfeb2f7c8572987ffe7dc4)
+[comment]: # ( SHA256STAMP:fdc550a0ff11f6fbbf51c29340c0494077d831566ae7ab008cce4b93034a76c5)

doc/schemas/listfunds.schema.json

@@ -33,10 +33,6 @@
             "type": "msat",
             "description": "the amount of the output"
           },
-          "value": {
-            "type": "u64",
-            "deprecated": true
-          },
           "scriptpubkey": {
             "type": "hex",
             "description": "the scriptPubkey of the output"