Remove extra_env and corresponding test (#581)

jupyter_client/manager.py

@@ -268,10 +268,8 @@ def pre_start_kernel(self, **kw):
             # If kernel_cmd has been set manually, don't refer to a kernel spec.
             # Environment variables from kernel spec are added to os.environ.
             env.update(self._get_env_substitutions(self.kernel_spec.env, env))
-        elif self.extra_env:
-            env.update(self._get_env_substitutions(self.extra_env, env))
-        kw['env'] = env
 
+        kw['env'] = env
         return kernel_cmd, kw
 
     def _get_env_substitutions(self, templated_env, substitution_values):

jupyter_client/tests/test_kernelmanager.py

@@ -75,27 +75,6 @@ def start_kernel():
     assert km.context.closed
 
 
-@pytest.fixture
-def start_kernel_w_env():
-    kernel_cmd = [sys.executable,
-                  '-m', 'jupyter_client.tests.signalkernel',
-                  '-f', '{connection_file}']
-    extra_env = {'TEST_VARS': '${TEST_VARS}:test_var_2'}
-
-    km = KernelManager(kernel_name='signaltest')
-    km.kernel_cmd = kernel_cmd
-    km.extra_env = extra_env
-    km.start_kernel()
-    kc = km.client()
-    kc.start_channels()
-
-    kc.wait_for_ready(timeout=60)
-
-    yield km, kc
-    kc.stop_channels()
-    km.shutdown_kernel()
-
-
 @pytest.fixture
 def km(config):
     km = KernelManager(config=config)
@@ -210,13 +189,6 @@ def test_templated_kspec_env(self, install_kernel, start_kernel):
         assert km.context.closed is False
         self._env_test_body(kc)
 
-    def test_templated_extra_env(self, install_kernel, start_kernel_w_env):
-        km, kc = start_kernel_w_env
-        assert km.is_alive()
-        assert kc.is_alive()
-        assert km.context.closed is False
-        self._env_test_body(kc)
-
     def test_cleanup_context(self, km):
         assert km.context is not None
         km.cleanup_resources(restart=False)