hw plugins: (cleanup) rm no-op clear_client argument from keystore.give_error

The keystore does not have a "client" field.
One is supposed to use the "get_client" method instead (the generic API is `plugin.get_client(keystore)`)
Remnants of old code.

electrum/plugins/bitbox02/bitbox02.py

@@ -564,14 +564,12 @@ class BitBox02_KeyStore(Hardware_KeyStore):
     def get_client(self) -> Optional['BitBox02Client']:
         return self.plugin.get_client(self)
 
-    def give_error(self, message: Exception, clear_client: bool = False):
+    def give_error(self, message: Exception):
         self.logger.info(message)
         if not self.ux_busy:
             self.handler.show_error(message)
         else:
             self.ux_busy = False
-        if clear_client:
-            self.client = None
         raise UserFacingException(message)
 
     def decrypt_message(self, pubkey, message, password):
@@ -606,7 +604,7 @@ class BitBox02_KeyStore(Hardware_KeyStore):
 
         except Exception as e:
             self.logger.exception("")
-            self.give_error(e, True)
+            self.give_error(e)
             return
 
     @runs_in_hwd_thread

electrum/plugins/coldcard/coldcard.py

@@ -280,14 +280,12 @@ class Coldcard_KeyStore(Hardware_KeyStore):
 
         return rv
 
-    def give_error(self, message, clear_client=False):
+    def give_error(self, message):
         self.logger.info(message)
         if not self.ux_busy:
             self.handler.show_error(message)
         else:
             self.ux_busy = False
-        if clear_client:
-            self.client = None
         raise UserFacingException(message)
 
     def wrap_busy(func):
@@ -351,7 +349,7 @@ class Coldcard_KeyStore(Hardware_KeyStore):
             self.handler.show_error('{}\n\n{}'.format(
                 _('Error showing address') + ':', str(exc)))
         except Exception as e:
-            self.give_error(e, True)
+            self.give_error(e)
 
         # give empty bytes for error cases; it seems to clear the old signature box
         return b''
@@ -397,7 +395,7 @@ class Coldcard_KeyStore(Hardware_KeyStore):
             return
         except BaseException as e:
             self.logger.exception('')
-            self.give_error(e, True)
+            self.give_error(e)
             return
 
         tx2 = PartialTransaction.from_raw_psbt(raw_resp)

electrum/plugins/digitalbitbox/digitalbitbox.py

@@ -444,9 +444,7 @@ class DigitalBitbox_KeyStore(Hardware_KeyStore):
         Hardware_KeyStore.__init__(self, d)
         self.maxInputs = 14 # maximum inputs per single sign command
 
-    def give_error(self, message, clear_client = False):
-        if clear_client:
-            self.client = None
+    def give_error(self, message):
         raise Exception(message)
 
 
@@ -652,7 +650,7 @@ class DigitalBitbox_KeyStore(Hardware_KeyStore):
         except UserCancelled:
             raise
         except BaseException as e:
-            self.give_error(e, True)
+            self.give_error(e)
         else:
             _logger.info(f"Transaction is_complete {tx.is_complete()}")
 

electrum/plugins/ledger/ledger.py

@@ -260,14 +260,12 @@ class Ledger_KeyStore(Hardware_KeyStore):
     def get_client_electrum(self) -> Optional[Ledger_Client]:
         return self.plugin.get_client(self)
 
-    def give_error(self, message, clear_client = False):
+    def give_error(self, message):
         _logger.info(message)
         if not self.signing:
             self.handler.show_error(message)
         else:
             self.signing = False
-        if clear_client:
-            self.client = None
         raise UserFacingException(message)
 
     def set_and_unset_signing(func):
@@ -306,18 +304,20 @@ class Ledger_KeyStore(Hardware_KeyStore):
             signature = client_ledger.signMessageSign(pin)
         except BTChipException as e:
             if e.sw == 0x6a80:
-                self.give_error("Unfortunately, this message cannot be signed by the Ledger wallet. Only alphanumerical messages shorter than 140 characters are supported. Please remove any extra characters (tab, carriage return) and retry.")
+                self.give_error("Unfortunately, this message cannot be signed by the Ledger wallet. "
+                                "Only alphanumerical messages shorter than 140 characters are supported. "
+                                "Please remove any extra characters (tab, carriage return) and retry.")
             elif e.sw == 0x6985:  # cancelled by user
                 return b''
             elif e.sw == 0x6982:
                 raise  # pin lock. decorator will catch it
             else:
-                self.give_error(e, True)
+                self.give_error(e)
         except UserWarning:
             self.handler.show_error(_('Cancelled by user'))
             return b''
         except Exception as e:
-            self.give_error(e, True)
+            self.give_error(e)
         finally:
             self.handler.finished()
         # Parse the ASN.1 signature
@@ -541,10 +541,10 @@ class Ledger_KeyStore(Hardware_KeyStore):
                 raise  # pin lock. decorator will catch it
             else:
                 self.logger.exception('')
-                self.give_error(e, True)
+                self.give_error(e)
         except BaseException as e:
             self.logger.exception('')
-            self.give_error(e, True)
+            self.give_error(e)
         finally:
             self.handler.finished()