Remove unnecessary CovFailUnderWarning. Closes #675.

Author: ionelmc

src/pytest_cov/__init__.py

@@ -27,12 +27,6 @@ class CovReportWarning(PytestCovWarning):
     """
 
 
-class CovFailUnderWarning(PytestCovWarning):
-    """
-    Indicates that we failed to generate a report.
-    """
-
-
 class CentralCovContextWarning(PytestCovWarning):
     """
     Indicates that dynamic_context was set to test_function instead of using the builtin --cov-context.

src/pytest_cov/plugin.py

@@ -12,7 +12,6 @@
 from coverage.results import should_fail_under
 
 from . import CovDisabledWarning
-from . import CovFailUnderWarning
 from . import CovReportWarning
 from . import compat
 from . import embed
@@ -352,7 +351,6 @@ def pytest_runtestloop(self, session):
                     p=cov_precision,
                 )
                 session.config.pluginmanager.getplugin('terminalreporter').write(f'\nERROR: {message}\n', red=True, bold=True)
-                warnings.warn(CovFailUnderWarning(message), stacklevel=1)
                 # make sure we get the EXIT_TESTSFAILED exit code
                 compat_session.testsfailed += 1