Remove double import (python#11452)

The double import should be unnecessary because the bug it is talking
about was fixed by python#10550.

Author: pranavrajpal

mypy/report.py

@@ -25,10 +25,7 @@
 from mypy.defaults import REPORTER_NAMES
 
 try:
-    # mypyc doesn't properly handle import from of submodules that we
-    # don't have stubs for, hence the hacky double import
-    import lxml.etree  # type: ignore  # noqa: F401
-    from lxml import etree
+    from lxml import etree  # type: ignore
     LXML_INSTALLED = True
 except ImportError:
     LXML_INSTALLED = False