templater: drop global exception catcher from runfilter() (API)

Now all built-in template filters declare input data types or handle type
errors by themselves.

.. api::

   Template filters should declare input data type and/or catch
   AttributeError, ValueError, TypeError, etc. as needed. See the doc of
   ``registrar.templatefilters`` for details.

mercurial/templateutil.py

@@ -428,8 +428,6 b' def runfilter(context, mapping, data):'
     try:
         thing = unwrapastype(thing, getattr(filt, '_intype', None))
         return filt(thing)
-    except (ValueError, AttributeError, TypeError):
-        raise error.Abort(_formatfiltererror(arg, filt))
     except error.ParseError as e:
         raise error.ParseError(bytes(e), hint=_formatfiltererror(arg, filt))