Merge bitcoin/bitcoin#31893: test: remove scanning check on wallet_importdescriptors

405dd0e test: remove scanning check on `wallet_importdescriptors` (brunoerg)

Pull request description:

  Reverts recently merged bitcoin/bitcoin#31768 due to CI failures, see issue bitcoin/bitcoin#31881.

ACKs for top commit:
  hodlinator:
    cr-ACK 405dd0e
  BrandonOdiwuor:
    Code Review ACK 405dd0e
  theStack:
    ACK 405dd0e

Tree-SHA512: 7f6182f073c12e44b76ac3069307990ba1d70310173f1adefdb1aa3eda3bdd2e81172dee75355f2e2e4f8edf9b8979256e2ed8c3fa5c953e99ecd0bb53bec3ed

Author: fanquake

test/functional/wallet_importdescriptors.py

@@ -24,7 +24,6 @@
 from test_framework.descriptors import descsum_create
 from test_framework.util import (
     assert_equal,
-    assert_greater_than,
     assert_raises_rpc_error,
 )
 from test_framework.wallet_util import (
@@ -706,13 +705,6 @@ def run_test(self):
             except JSONRPCException as e:
                 assert e.error["code"] == -4 and "Error: the wallet is currently being used to rescan the blockchain for related transactions. Please call `abortrescan` before changing the passphrase." in e.error["message"]
 
-            wallet_info = self.nodes[0].cli("-rpcwallet=encrypted_wallet").getwalletinfo()
-            try:
-                duration = wallet_info["scanning"]["duration"]
-                assert_greater_than(duration, 0)
-            except Exception:
-                assert "scanning" not in wallet_info
-
             assert_equal(importing.result(), [{"success": True}])
 
         assert_equal(temp_wallet.getbalance(), encrypted_wallet.getbalance())