tests: drop `(py3 !)` output matching predicates
Presumably these were paired with `(no-py3 !)` at one point, but now they were
unconditionally true.
test-check-code.t required a couple of `(glob)` markers on the changed lines in
test-lfs-serve-access.t, because of the `$LOCALIP` usage on those lines. Not
sure how those lines slipped through the checks previously.
edition = "2018"
max_width = 79
wrap_comments = true
error_on_line_overflow = true