debian/control: drop debian-maintainers from Suggests

The keyring of interest is available in the debian-keyring package.

debian/changelog

@@ -7,6 +7,8 @@ dpkg (1.15.6) UNRELEASED; urgency=low
       representation ("$dep") to provide the result of $dep->output()
     - prefix public functions in Dpkg::Deps with deps_ and export them
       by default
+  * Drop debian-maintainers from Suggests since it's obsolete, the
+    corresponding keyring is in debian-keyring.
 
   [ Guillem Jover ]
   * Handle argument parsing in dpkg-checkbuilddeps and dpkg-scanpackages

debian/control

@@ -44,7 +44,7 @@ Depends: dpkg (>= 1.15.4), perl5, perl-modules, bzip2, lzma, xz-utils,
  patch (>= 2.2-1), make, binutils, libtimedate-perl,
  base-files (>= 5.0.0), ${misc:Depends}
 Recommends: gcc | c-compiler, build-essential, fakeroot, gnupg, gpgv
-Suggests: debian-keyring, debian-maintainers
+Suggests: debian-keyring
 Conflicts: dpkg-cross (<< 2.0.0), devscripts (<< 2.10.26)
 Replaces: manpages-pl (<= 20051117-1)
 Description: Debian package development tools