truelayer: remove currency from target account name

Previously the account currency would be appended to the baseAccount name.
e.g. RevolutGBP, RevolutUSD

It's now recommended to enable multiple currencies for the baseAccount.

e.g.
```beancount
2015-07-01 open Assets:Current-Assets:Revolut     GBP,USD
```

src/tariochbctools/importers/truelayer/importer.py

@@ -96,7 +96,6 @@ def _extract_endpoint_transactions(self, endpoint, headers, invert_sign=False):
 
         for account in r.json()["results"]:
             accountId = account["account_id"]
-            accountCcy = account["currency"]
             r = requests.get(
                 f"https://api.{self.domain}/data/v1/{endpoint}/{accountId}/transactions",
                 headers=headers,
@@ -105,14 +104,12 @@ def _extract_endpoint_transactions(self, endpoint, headers, invert_sign=False):
 
             for trx in transactions:
                 entries.extend(
-                    self._extract_transaction(
-                        trx, accountCcy, transactions, invert_sign
-                    )
+                    self._extract_transaction(trx, transactions, invert_sign)
                 )
 
         return entries
 
-    def _extract_transaction(self, trx, accountCcy, transactions, invert_sign):
+    def _extract_transaction(self, trx, transactions, invert_sign):
         entries = []
         metakv = {}
 
@@ -133,7 +130,7 @@ def _extract_transaction(self, trx, accountCcy, transactions, invert_sign):
 
         meta = data.new_metadata("", 0, metakv)
         trxDate = dateutil.parser.parse(trx["timestamp"]).date()
-        account = self.baseAccount + accountCcy
+        account = self.baseAccount
 
         tx_amount = D(str(trx["amount"]))
         # avoid pylint invalid-unary-operand-type

tests/tariochbctools/importers/test_truelayer.py

@@ -87,65 +87,51 @@ def test_identify(importer, tmp_config):
 
 
 def test_extract_transaction_simple(importer, tmp_trx):
-    entries = importer._extract_transaction(
-        tmp_trx, "GBP", [tmp_trx], invert_sign=False
-    )
+    entries = importer._extract_transaction(tmp_trx, [tmp_trx], invert_sign=False)
     assert entries[0].postings[0].units.number == D(str(tmp_trx["amount"]))
 
 
 def test_extract_transaction_with_balance(importer, tmp_trx):
-    entries = importer._extract_transaction(
-        tmp_trx, "GBP", [tmp_trx], invert_sign=False
-    )
+    entries = importer._extract_transaction(tmp_trx, [tmp_trx], invert_sign=False)
     # one entry, one balance
     assert len(entries) == 2
     assert entries[1].amount.number == D(str(tmp_trx["running_balance"]["amount"]))
 
 
 def test_extract_transaction_invert_sign(importer, tmp_trx):
     """Show that sign inversion works"""
-    entries = importer._extract_transaction(tmp_trx, "GBP", [tmp_trx], invert_sign=True)
+    entries = importer._extract_transaction(tmp_trx, [tmp_trx], invert_sign=True)
     assert entries[0].postings[0].units.number == -D(str(tmp_trx["amount"]))
 
 
 @pytest.mark.parametrize("id_field", tlimp.TX_MANDATORY_ID_FIELDS)
 def test_extract_transaction_has_transaction_id(importer, tmp_trx, id_field):
     """Ensure mandatory IDs are in extracted transactions."""
-    entries = importer._extract_transaction(
-        tmp_trx, "GBP", [tmp_trx], invert_sign=False
-    )
+    entries = importer._extract_transaction(tmp_trx, [tmp_trx], invert_sign=False)
     assert entries[0].meta[id_field] == tmp_trx[id_field]
 
 
 @pytest.mark.parametrize("id_field", tlimp.TX_OPTIONAL_ID_FIELDS)
 def test_trx_id(importer, tmp_trx, id_field):
-    entries = importer._extract_transaction(
-        tmp_trx, "GBP", [tmp_trx], invert_sign=False
-    )
+    entries = importer._extract_transaction(tmp_trx, [tmp_trx], invert_sign=False)
     assert entries[0].meta[id_field] == tmp_trx[id_field]
 
 
 @pytest.mark.parametrize("id_field", tlimp.TX_OPTIONAL_ID_FIELDS)
 def test_trx_id_is_optional(importer, id_field):
     tmp_trx = json.loads(TEST_TRX_WITHOUT_IDS)
-    entries = importer._extract_transaction(
-        tmp_trx, "GBP", [tmp_trx], invert_sign=False
-    )
+    entries = importer._extract_transaction(tmp_trx, [tmp_trx], invert_sign=False)
     assert entries[0].meta.get(id_field) is None
 
 
 @pytest.mark.parametrize("id_field", tlimp.TX_OPTIONAL_META_ID_FIELDS)
 def test_trx_meta_id(importer, tmp_trx, id_field):
-    entries = importer._extract_transaction(
-        tmp_trx, "GBP", [tmp_trx], invert_sign=False
-    )
+    entries = importer._extract_transaction(tmp_trx, [tmp_trx], invert_sign=False)
     assert entries[0].meta[id_field] == tmp_trx["meta"][id_field]
 
 
 @pytest.mark.parametrize("id_field", tlimp.TX_OPTIONAL_META_ID_FIELDS)
 def test_trx_meta_id_is_optional(importer, id_field):
     tmp_trx = json.loads(TEST_TRX_WITHOUT_IDS)
-    entries = importer._extract_transaction(
-        tmp_trx, "GBP", [tmp_trx], invert_sign=False
-    )
+    entries = importer._extract_transaction(tmp_trx, [tmp_trx], invert_sign=False)
     assert entries[0].meta.get(id_field) is None