MT#8395 Drop unused dependency on libemail-send-perl

Dependency on libcatalyst-plugin-email-perl was removed already.
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=748849 ->
libemail-send-perl was removed from unstable recently.

As libemail-send-perl is deprecated upstream, we should use
libemail-sender-perl instead and a dependency on
libemail-sender-perl was introduced already with git commit
1fd67eb3

debian/control

@@ -23,7 +23,6 @@ Build-Depends: debhelper (>= 8),
                libdbix-class-resultset-recursiveupdate-perl (>= 0.30~),
                libdevel-cover-perl,
                libemail-mime-perl,
-               libemail-send-perl,
                libemail-sender-perl,
                libfile-spec-perl (>= 3.4000~),
                libfile-type-perl,
@@ -93,7 +92,6 @@ Depends: gettext,
          libdatetime-perl,
          libdbix-class-resultset-recursiveupdate-perl (>= 0.30~),
          libemail-mime-perl,
-         libemail-send-perl,
          libemail-sender-perl,
          libemail-valid-perl,
          libfcgi-procmanager-perl,