git-notify: Remove unused tag notification code

The code which handles notifications regarding tags was unused, as only
objects listed by git-rev-list(1) are considered, and git-rev-list(1)
never spits out the sha1 of a tag object.

tools/git-notify

@@ -194,7 +194,7 @@ sub get_repos_name()
     return $repos;
 }
 
-# extract the information from a commit or tag object and return a hash containing the various fields
+# extract the information from a commit object and return a hash containing the various fields
 sub get_object_info($)
 {
     my $obj = shift;
@@ -202,21 +202,13 @@ sub get_object_info($)
     my @log = ();
     my $do_log = 0;
 
-    open TYPE, "-|" or exec "git", "cat-file", "-t", $obj or die "cannot run git-cat-file";
-    my $type = <TYPE>;
-    chomp $type;
-    close TYPE;
-
-    open OBJ, "-|" or exec "git", "cat-file", $type, $obj or die "cannot run git-cat-file";
+    open OBJ, "-|" or exec "git", "cat-file", "commit", $obj or die "cannot run git-cat-file";
     while (<OBJ>)
     {
         chomp;
-        if ($do_log)
-        {
-            last if /^-----BEGIN PGP SIGNATURE-----/;
-            push @log, $_;
-        }
-        elsif (/^(author|committer|tagger) ((.*) (<.*>)) (\d+) ([+-]\d+)$/)
+        if ($do_log) { push @log, $_; }
+        elsif (/^$/) { $do_log = 1; }
+        elsif (/^(author|committer) ((.*) (<.*>)) (\d+) ([+-]\d+)$/)
         {
             $info{$1} = $2;
             $info{$1 . "_name"} = $3;
@@ -224,15 +216,9 @@ sub get_object_info($)
             $info{$1 . "_date"} = $5;
             $info{$1 . "_tz"} = $6;
         }
-        elsif (/^tag (.*)$/)
-        {
-            $info{"tag"} = $1;
-        }
-        elsif (/^$/) { $do_log = 1; }
     }
     close OBJ;
 
-    $info{"type"} = $type;
     $info{"log"} = \@log;
     return %info;
 }
@@ -243,24 +229,8 @@ sub send_commit_notice($$)
     my ($ref,$obj) = @_;
     my %info = get_object_info($obj);
     my @notice = ();
-    my $subject;
 
-    if ($info{"type"} eq "tag")
-    {
-        push @notice,
-        "Module: $repos_name",
-        "Branch: $ref",
-        "Tag:    $obj",
-        $gitweb_url ? "URL:    $gitweb_url/?a=tag;h=$obj\n" : "",
-        "Tagger: " . $info{"tagger"},
-        "Date:   " . format_date($info{"tagger_date"},$info{"tagger_tz"}),
-        "",
-        join "\n", @{$info{"log"}};
-        $subject = "Tag " . $info{"tag"} . " : " . $info{"tagger_name"} . ": " . ${$info{"log"}}[0];
-    }
-    else
-    {
-        push @notice,
+    push @notice,
         "Module: $repos_name",
         "Branch: $ref",
         "Commit: $obj",
@@ -273,27 +243,26 @@ sub send_commit_notice($$)
         "---",
         "";
 
-        open STAT, "-|" or exec "git", "diff-tree", "--stat", "-M", "--no-commit-id", $obj or die "cannot exec git-diff-tree";
-        push @notice, join("", <STAT>);
-        close STAT;
-
-        open DIFF, "-|" or exec "git", "diff-tree", "-p", "-M", "--no-commit-id", $obj or die "cannot exec git-diff-tree";
-        my $diff = join( "", <DIFF> );
-        close DIFF;
+    open STAT, "-|" or exec "git", "diff-tree", "--stat", "-M", "--no-commit-id", $obj or die "cannot exec git-diff-tree";
+    push @notice, join("", <STAT>);
+    close STAT;
 
-        if (($max_diff_size == -1) || (length($diff) < $max_diff_size))
-        {
-            push @notice, $diff;
-        }
-        else
-        {
-            push @notice, "Diff:   $gitweb_url/?a=commitdiff;h=$obj" if $gitweb_url;
-        }
+    open DIFF, "-|" or exec "git", "diff-tree", "-p", "-M", "--no-commit-id", $obj or die "cannot exec git-diff-tree";
+    my $diff = join( "", <DIFF> );
+    close DIFF;
 
-        $subject = $info{"author_name"} . ": " . ${$info{"log"}}[0];
+    if (($max_diff_size == -1) || (length($diff) < $max_diff_size))
+    {
+        push @notice, $diff;
+    }
+    else
+    {
+        push @notice, "Diff:   $gitweb_url/?a=commitdiff;h=$obj" if $gitweb_url;
     }
 
-    mail_notification($commitlist_address, $subject, "text/plain; charset=UTF-8", @notice);
+    mail_notification($commitlist_address,
+        $info{"author_name"} . ": " . ${$info{"log"}}[0],
+        "text/plain; charset=UTF-8", @notice);
 }
 
 # send a commit notice to the CIA server
@@ -303,8 +272,6 @@ sub send_cia_notice($$)
     my %info = get_object_info($commit);
     my @cia_text = ();
 
-    return if $info{"type"} ne "commit";
-
     push @cia_text,
         "<message>",
         "  <generator>",