flake fixes for unused variables

Author: felliott

mfr/extensions/codepygments/render.py

@@ -62,7 +62,7 @@ def _render_html(self, fp, ext, *args, **kwargs):
         content, encoding = None, 'utf-8'
         try:
             content = data.decode(encoding)
-        except UnicodeDecodeError as e:
+        except UnicodeDecodeError:
             detected_encoding = chardet.detect(data)
             encoding = detected_encoding.get('encoding', None)
             if encoding is None:

mfr/server/handlers/core.py

@@ -169,7 +169,7 @@ def write_error(self, status_code, exc_info):
 
                 current['materialized_type'] = '.'.join([x[0] for x in exc.attr_stack])
                 self.error_metrics = current
-            except Exception as exc:
+            except Exception:
                 pass
             self.set_status(exc.code)
             self.finish(exc.as_html())