Revert "javascript.assemble: Support document module"

This reverts commit afc7faabda.

This isn't actually needed as we can't use document.getElementById()
directly without serializing anyways.

qutebrowser/utils/javascript.py

@@ -64,8 +64,8 @@ def _convert_js_arg(arg):
 def assemble(module, function, *args):
     """Assemble a javascript file and a function call."""
     js_args = ', '.join(_convert_js_arg(arg) for arg in args)
-    if module in ['window', 'document']:
-        parts = [module, function]
+    if module == 'window':
+        parts = ['window', function]
     else:
         parts = ['window', '_qutebrowser', module, function]
     code = '"use strict";\n{}({});'.format('.'.join(parts), js_args)

tests/unit/utils/test_javascript.py

@@ -142,7 +142,6 @@ def test_convert_js_arg(arg, expected):
 
 @pytest.mark.parametrize('base, expected_base', [
     ('window', 'window'),
-    ('document', 'document'),
     ('foo', 'window._qutebrowser.foo'),
 ])
 def test_assemble(base, expected_base):