[dts] [PATCH V1]tests/external_memory: fix wrong output message and remove un-used lib

[yufengmx]

 fix wrong output message format in verifier_result method 
 remove un-used string lib import 

yufengmx (1):
  tests/external_memory: fix wrong output message

 tests/TestSuite_external_memory.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

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1.9.3