perlPackages.IOPty: make it an alias of IOTty

The IOPty and IOTty packages refer to the same tarball. Make the former
an alias of the latter so that we don't have to maintain this package
twice.

pkgs/top-level/perl-packages.nix

@@ -12951,23 +12951,6 @@ with self; {
     };
   };
 
-  IOPty = buildPerlModule {
-    pname = "IO-Pty";
-    version = "1.16";
-    src = fetchurl {
-      url = "mirror://cpan/authors/id/T/TO/TODDR/IO-Tty-1.16.tar.gz";
-      hash = "sha256-jxoJwHBzitxpXfkD8uf3QwjdjZkbkUwLw5Cg5gISlN0=";
-    };
-    buildPhase = "make";
-    checkPhase = "make test";
-    installPhase = "make install";
-    meta = {
-      homepage = "https://github.com/toddr/IO-Tty";
-      description = "Pseudo TTY object class";
-      license = with lib.licenses; [ artistic1 gpl1Plus ];
-    };
-  };
-
   IOPrompt = buildPerlModule {
     pname = "IO-Prompt";
     version = "0.997004";
@@ -13140,6 +13123,7 @@ with self; {
     };
     doCheck = !stdenv.hostPlatform.isDarwin;  # openpty fails in the sandbox
     meta = {
+      homepage = "https://github.com/toddr/IO-Tty";
       description = "Low-level allocate a pseudo-Tty, import constants";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
     };
@@ -29512,6 +29496,7 @@ with self; {
   DistZillaPluginNoTabsTests = self.DistZillaPluginTestNoTabs;
   EmailMIMEModifier = self.EmailMIME;
   ExtUtilsCommand = self.ExtUtilsMakeMaker;
+  IOPty = self.IOTty;
   IOSocketInet6 = self.IOSocketINET6;
   IOstringy = self.IOStringy;
   libintl_perl = self.libintl-perl;