tests/test-custom-filters.out

revlog.size: remove alternate implementation (revlogv0 specific)

it's only useful for revlogv0 anyway, revlogNG has the uncompressed size in
the index.

% Repository data:
Some stuff to ponder very carefully.
% Fresh checkout:
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
Copyright 2046, The Masters
Some stuff to ponder very carefully.
M stuff.txt
% Problem encoding:
abort: missing header "Copyright 2046, The Masters" in morestuff.txt
M stuff.txt
A morestuff.txt