bugfix for handling match=strict in iosxr_config

Resolves an issue where match=strict would act like match=exact when
evaluating the configuration

network/iosxr/iosxr_config.py

@@ -153,9 +153,6 @@ def build_candidate(lines, parents, config, strategy):
     candidate = list()
 
     if strategy == 'strict':
-        if len(lines) != len(config):
-            candidate = list(lines)
-        else:
         for index, cmd in enumerate(lines):
             try:
                 if cmd != config[index]: