Do not use file locks when saving the report file

reframe/frontend/reporting/__init__.py

@@ -419,7 +419,11 @@ def update_run_stats(self, stats):
             'num_skipped': self.__report['runs'][-1]['num_skipped']
         })
 
-    def _save(self, filename, compress, link_to_last):
+    def is_empty(self):
+        '''Return :obj:`True` is no test cases where run'''
+        return self.__report['session_info']['num_cases'] == 0
+
+    def save(self, filename, compress=False, link_to_last=True):
         filename = _expand_report_filename(filename, newfile=True)
         with open(filename, 'w') as fp:
             if compress:
@@ -446,15 +450,6 @@ def _save(self, filename, compress, link_to_last):
                 else:
                     raise ReframeError('path exists and is not a symlink')
 
-    def is_empty(self):
-        '''Return :obj:`True` is no test cases where run'''
-        return self.__report['session_info']['num_cases'] == 0
-
-    def save(self, filename, compress=False, link_to_last=True):
-        prefix = os.path.dirname(filename) or '.'
-        with FileLock(os.path.join(prefix, '.report.lock')):
-            self._save(filename, compress, link_to_last)
-
     def store(self):
         '''Store the report in the results storage.'''