analyze_outcomes: symplify log functions

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/scripts/analyze_outcomes.py b/tests/scripts/analyze_outcomes.py
index 7b09bb5..090fd0e 100755
--- a/tests/scripts/analyze_outcomes.py
+++ b/tests/scripts/analyze_outcomes.py
@@ -20,25 +20,18 @@
         self.error_count = 0
         self.warning_count = 0
 
-    # Private method
     @staticmethod
-    def __log(fmt, *args, **kwargs):
+    def log(fmt, *args, **kwargs):
         sys.stderr.write((fmt + '\n').format(*args, **kwargs))
 
     def error(self, fmt, *args, **kwargs):
-        self.__log('Error: ' + fmt, *args, **kwargs)
+        self.log('Error: ' + fmt, *args, **kwargs)
         self.error_count += 1
 
     def warning(self, fmt, *args, **kwargs):
-        self.__log('Warning: ' + fmt, *args, **kwargs)
+        self.log('Warning: ' + fmt, *args, **kwargs)
         self.warning_count += 1
 
-    # This is a static method because we don't need to track any data about
-    # the number of times it is called
-    @staticmethod
-    def info(fmt, *args, **kwargs):
-        Results.__log(fmt, *args, **kwargs)
-
 class TestCaseOutcomes:
     """The outcomes of one test case across many configurations."""
     # pylint: disable=too-few-public-methods
@@ -103,7 +96,7 @@
             if component_ref in entry:
                 reference_test_passed = True
         if(reference_test_passed and not driver_test_passed):
-            Results.info(key)
+            Results.log(key)
             result = False
     return result
 
@@ -138,7 +131,7 @@
     """Perform coverage analysis."""
     del args # unused
     outcomes = read_outcome_file(outcome_file)
-    Results.info("\n*** Analyze coverage ***\n")
+    Results.log("\n*** Analyze coverage ***\n")
     results = analyze_outcomes(outcomes)
     return results.error_count == 0
 
@@ -147,7 +140,7 @@
     ignored_suites = ['test_suite_' + x for x in args['ignored_suites']]
 
     outcomes = read_outcome_file(outcome_file)
-    Results.info("\n*** Analyze driver {} vs reference {} ***\n".format(
+    Results.log("\n*** Analyze driver {} vs reference {} ***\n".format(
         args['component_driver'], args['component_ref']))
     return analyze_driver_vs_reference(outcomes, args['component_ref'],
                                        args['component_driver'], ignored_suites,
@@ -208,7 +201,7 @@
 
         if options.list:
             for task in TASKS:
-                Results.info(task)
+                Results.log(task)
             sys.exit(0)
 
         result = True
@@ -220,7 +213,7 @@
 
             for task in tasks:
                 if task not in TASKS:
-                    Results.info('Error: invalid task: {}'.format(task))
+                    Results.log('Error: invalid task: {}'.format(task))
                     sys.exit(1)
 
         for task in TASKS:
@@ -230,7 +223,7 @@
 
         if result is False:
             sys.exit(1)
-        Results.info("SUCCESS :-)")
+        Results.log("SUCCESS :-)")
     except Exception: # pylint: disable=broad-except
         # Print the backtrace and exit explicitly with our chosen status.
         traceback.print_exc()