Remove decred - mainnet fails to sync

This doesn't seem likely to be fixed soon given the protocol
is quite different.

Closes #414

lib/coins.py

@@ -1634,60 +1634,6 @@ class BitcoinAtom(Coin):
         return deserializer.read_header(height, cls.BASIC_HEADER_SIZE)
 
 
-class Decred(Coin):
-    NAME = "Decred"
-    SHORTNAME = "DCR"
-    NET = "mainnet"
-    XPUB_VERBYTES = bytes('dpub', 'utf-8')
-    XPRV_VERBYTES = bytes('dprv', 'utf-8')
-    P2PKH_VERBYTE = bytes('Ds', 'utf-8')
-    P2SH_VERBYTES = [bytes('Dc', 'utf-8')]
-    WIF_BYTE = bytes('Pm', 'utf-8')
-    GENESIS_HASH = ('298e5cc3d985bfe7f81dc135f360abe089ed'
-                    'd4396b86d2de66b0cef42b21d980')
-    DESERIALIZER = lib_tx.DeserializerDecred
-    ENCODE_CHECK = partial(Base58.encode_check,
-                           hash_fn=lib_tx.DeserializerDecred.blake256)
-    DECODE_CHECK = partial(Base58.decode_check,
-                           hash_fn=lib_tx.DeserializerDecred.blake256)
-    HEADER_HASH = lib_tx.DeserializerDecred.blake256
-    BASIC_HEADER_SIZE = 180
-    ALLOW_ADVANCING_ERRORS = True
-    TX_COUNT = 217380620
-    TX_COUNT_HEIGHT = 218875
-    TX_PER_BLOCK = 1000
-    RPC_PORT = 9109
-
-    @classmethod
-    def header_hash(cls, header):
-        '''Given a header return the hash.'''
-        return cls.HEADER_HASH(header)
-
-    @classmethod
-    def block(cls, raw_block, height):
-        '''Return a Block namedtuple given a raw block and its height.'''
-        if height > 0:
-            return super().block(raw_block, height)
-        else:
-            return Block(raw_block, cls.block_header(raw_block, height), [])
-
-
-class DecredTestnet(Decred):
-    NAME = "Decred"
-    NET = "testnet"
-    XPUB_VERBYTES = bytes('tpub', 'utf-8')
-    XPRV_VERBYTES = bytes('tprv', 'utf-8')
-    P2PKH_VERBYTE = bytes('Ts', 'utf-8')
-    P2SH_VERBYTES = [bytes('Tc', 'utf-8')]
-    WIF_BYTE = bytes('Pt', 'utf-8')
-    GENESIS_HASH = ('4261602a9d07d80ad47621a64ba6a0'
-                    '7754902e496777edc4ff581946bd7bc29c')
-    TX_COUNT = 3176305
-    TX_COUNT_HEIGHT = 254198
-    TX_PER_BLOCK = 1000
-    RPC_PORT = 19109
-
-
 class Axe(Dash):
     NAME = "Axe"
     SHORTNAME = "AXE"

tests/blocks/decred_testnet_200000.json

@@ -1,17 +0,0 @@
-{
-  "hash": "0000000003416ee936e24e3d8ebb0ae12cc9cd397df61346f2805642676291ae",
-  "size": 1637,
-  "height": 200000,
-  "merkleroot": "560d636172de028d728723b41428eb51acb4e969caf54f50f0de19f14a66fb1e",
-  "tx": [
-    "42fb258edd91d3b4aeea43f2451311b1045e3d0f935491301e03377eb86b1c46",
-    "9b1e326156e1426d1b2c32d711e660c936f53fcdf90de3ea4f8ae18c695751e0",
-    "017ac016d59cbc1b381ae71f61173bf9b5eaf85e338f2b81df73f88574bc7fa6",
-    "a15ddc52b33346ddb22005eaf622336d0f56856f598e1068d1fba280d9cf0408"
-  ],
-  "time": 1513807068,
-  "nonce": 4094753344,
-  "bits": "1c038167",
-  "previousblockhash": "0000000001c195bb55127867a4dbeb9385fc14113db92a787ccd8c64d4bab58f",
-  "block": "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"
-}