[PATCH 1/8] v2: use v5.10.1, parent.pm, drop warnings

[Eric Wong <e@yhbt.net>]

The "5.010_001" form was for Perl 5.6, which I doubt anybody
would attempt; so favor "v5.10.1" as it is more readable to
humans.  Prefer "parent" to "base" since the former is lighter.
We'll also rely on warnings from "-w" globally (or not) instead
of via "use".

We'll also update "use" statements to reflect what's actually
used by V2Writable.
---
 lib/PublicInbox/SearchIdxShard.pm | 4 ++--
 lib/PublicInbox/V2Writable.pm     | 7 +++----
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/lib/PublicInbox/SearchIdxShard.pm b/lib/PublicInbox/SearchIdxShard.pm
index f7ba293f..baf7352a 100644
--- a/lib/PublicInbox/SearchIdxShard.pm
+++ b/lib/PublicInbox/SearchIdxShard.pm
@@ -5,8 +5,8 @@
 # See L<public-inbox-v2-format(5)> for more info on how we shard Xapian
 package PublicInbox::SearchIdxShard;
 use strict;
-use warnings;
-use base qw(PublicInbox::SearchIdx);
+use v5.10.1;
+use parent qw(PublicInbox::SearchIdx);
 use IO::Handle (); # autoflush
 use PublicInbox::Eml;
 
diff --git a/lib/PublicInbox/V2Writable.pm b/lib/PublicInbox/V2Writable.pm
index 528f5e9a..0119ea76 100644
--- a/lib/PublicInbox/V2Writable.pm
+++ b/lib/PublicInbox/V2Writable.pm
@@ -5,16 +5,15 @@
 # Used to write to V2 inboxes (see L<public-inbox-v2-format(5)>).
 package PublicInbox::V2Writable;
 use strict;
-use warnings;
-use base qw(PublicInbox::Lock);
-use 5.010_001;
+use v5.10.1;
+use parent qw(PublicInbox::Lock);
 use PublicInbox::SearchIdxShard;
 use PublicInbox::Eml;
 use PublicInbox::Git;
 use PublicInbox::Import;
 use PublicInbox::MID qw(mids references);
 use PublicInbox::ContentHash qw(content_hash content_digest);
-use PublicInbox::Inbox;
+use PublicInbox::InboxWritable;
 use PublicInbox::OverIdx;
 use PublicInbox::Msgmap;
 use PublicInbox::Spawn qw(spawn popen_rd);