Bug 1254374 - Remove the old TestConfigure.test_imports test. r=nalexander

It now duplicates the test added in bug 1256573, which is actually better.

python/mozbuild/mozbuild/test/configure/data/moz.configure

@@ -147,22 +147,6 @@ include(include_path)
 # The order of the decorators matter: @imports needs to appear after other
 # decorators.
 option('--with-imports', nargs='?', help='Imports')
-@depends('--with-imports')
-@imports(_from='mozbuild.configure.options', _import='OptionValue')
-def with_imports(value):
-    if value:
-        return isinstance(value, OptionValue)
-
-set_config('IMPORTS', with_imports)
-
-# Trying to import manually will fail at runtime.
-@depends('--with-imports')
-def with_imports(value):
-    if len(value) and value[0] == 'break':
-        from mozbuild.configure.options import OptionValue
-        return isinstance(value, OptionValue)
-
-set_config('IMPORTS2', with_imports)
 
 # A limited set of functions from os.path are exposed by default.
 @depends('--with-imports')

python/mozbuild/mozbuild/test/configure/test_configure.py

@@ -227,14 +227,6 @@ class TestConfigure(unittest.TestCase):
         config = self.get_config(env={'CC': 'clang'})
         self.assertNotIn('CFLAGS', config)
 
-    def test_imports(self):
-        config = self.get_config(['--with-imports'])
-        self.assertIn('IMPORTS', config)
-        self.assertEquals(config['IMPORTS'], True)
-
-        with self.assertRaises(ImportError):
-            self.get_config(['--with-imports=break'])
-
     def test_imports(self):
         config = {}
         out = StringIO()