Clean up some plugin tests.

1 files changed, 2 insertions, 3 deletions

diff --git a/coverage/control.py b/coverage/control.py
index d211055..1191b9e 100644
--- a/coverage/control.py
+++ b/coverage/control.py
@@ -9,7 +9,7 @@ from coverage.collector import Collector
 from coverage.config import CoverageConfig
 from coverage.data import CoverageData
 from coverage.debug import DebugControl
-from coverage.plugin import Plugins, plugin_implements
+from coverage.plugin import CoveragePlugin, Plugins, overrides
 from coverage.files import FileLocator, TreeMatcher, FnmatchMatcher
 from coverage.files import PathAliases, find_python_files, prep_patterns
 from coverage.html import HtmlReporter
@@ -179,7 +179,7 @@ class Coverage(object):
 
         self.file_tracers = []
         for plugin in self.plugins:
-            if plugin_implements(plugin, "file_tracer"):
+            if overrides(plugin, "file_tracer", CoveragePlugin):
                 self.file_tracers.append(plugin)
         self.file_tracers.append(None)      # The Python case.
 
@@ -354,7 +354,6 @@ class Coverage(object):
         # Try the plugins, see if they have an opinion about the file.
         for plugin in self.file_tracers:
             if plugin:
-                #plugin.trace_judge(disp)
                 file_tracer = plugin.file_tracer(canonical)
                 if file_tracer is not None:
                     file_tracer.plugin_name = plugin.plugin_name