wallet: remove `hexseed` attribute

mmgen/wallet/dieroll.py

@@ -61,7 +61,6 @@ class wallet(wallet):
 				self.desc += ' plus user-supplied entropy'
 
 		self.seed = Seed( self.cfg, seed_bytes )
-		self.ssdata.hexseed = seed_bytes.hex()
 
 		self.check_usr_seed_len()
 		return True

mmgen/wallet/mmhex.py

@@ -25,7 +25,6 @@ class wallet(wallet):
 	def _format(self):
 		h = self.seed.hexdata
 		self.ssdata.chksum = make_chksum_6(h)
-		self.ssdata.hexseed = h
 		self.fmt_data = f'{self.ssdata.chksum} {split_into_cols(4,h)}\n'
 
 	def _deformat(self):
@@ -57,7 +56,6 @@ class wallet(wallet):
 
 		self.seed = Seed( self.cfg, bytes.fromhex(hstr) )
 		self.ssdata.chksum = chk
-		self.ssdata.hexseed = hstr
 
 		self.check_usr_seed_len()
 

mmgen/wallet/plainhex.py

@@ -37,7 +37,6 @@ class wallet(wallet):
 			return False
 
 		self.seed = Seed( self.cfg, bytes.fromhex(d) )
-		self.ssdata.hexseed = d
 
 		self.check_usr_seed_len()