bpo-35024: Remove redundant and possibly incorrect verbose message after writing '.pyc' (GH-9998)

Since `SourceFileLoader.set_data()` catches exceptions raised by `_write_atomic()` and logs an informative message consequently, always logging successful outcome in 'SourceLoader.get_code()' seems redundant.  



https://bugs.python.org/issue35024

Lib/importlib/_bootstrap_external.py

@@ -920,7 +920,6 @@ class SourceLoader(_LoaderBasics):
                                               len(source_bytes))
             try:
                 self._cache_bytecode(source_path, bytecode_path, data)
-                _bootstrap._verbose_message('wrote {!r}', bytecode_path)
             except NotImplementedError:
                 pass
         return code_object

Misc/NEWS.d/next/Library/2018-10-25-15-43-32.bpo-35024.ltSrtr.rst

+`importlib` no longer logs `wrote <bytecode path>` redundantly after
+`(created|could not create) <bytecode path>` is already logged.
+Patch by Quentin Agren.