Cleanup page decode

Signed-off-by: Nathaniel Clark <Nathaniel.Clark@misrule.us>

plugins/router/arris-sb6183

@@ -233,15 +233,8 @@ def process_url(url):
             file=sys.stderr,
         )
         return []
-    data = rxscript.sub(
-        "",
-        rxcomment.sub(
-            "",
-            rxblank.sub(
-                " ", "".join(map(lambda x: x.decode("utf-8"), resp.readlines()))
-            ),
-        ),
-    )
+    data = rxscript.sub("", rxcomment.sub("", rxblank.sub(" ", resp.read().decode())))
+
     dom = html.fromstring(data)
 
     return dom.xpath('//table[contains(@class, "simpleTable")]')