ghc*: remove some outdated ghc packages

These do not package on NetBSD 10, and are not needed for the
bootstrapping process any longer, since ghc's bootstrapping happens
via cross-compilation (from releases N, N-1, or N-2) nowadays.

ok pho@

As proposed on pkgsrc-users.

Author: 0-wiz-0

doc/CHANGES-2025

@@ -1,4 +1,4 @@
-$NetBSD: CHANGES-2025,v 1.1074 2025/02/05 05:00:58 schmonz Exp $
+$NetBSD: CHANGES-2025,v 1.1075 2025/02/05 07:50:22 wiz Exp $
 
 Changes to the packages collection and infrastructure in 2025:
 
@@ -1398,3 +1398,9 @@ Changes to the packages collection and infrastructure in 2025:
 	Updated misc/libreoffice to 25.2.0.3 [ryoon 2025-02-05]
 	Updated www/snac to 2.71 [schmonz 2025-02-05]
 	Updated devel/asdf to 0.16.1 [schmonz 2025-02-05]
+	Removed lang/ghc7 [wiz 2025-02-05]
+	Removed lang/ghc80 [wiz 2025-02-05]
+	Removed lang/ghc84 [wiz 2025-02-05]
+	Removed lang/ghc88 [wiz 2025-02-05]
+	Removed lang/ghc810 [wiz 2025-02-05]
+	Removed lang/ghc90 [wiz 2025-02-05]

lang/Makefile

@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.740 2025/01/29 13:22:22 pho Exp $
+# $NetBSD: Makefile,v 1.741 2025/02/05 07:50:22 wiz Exp $
 #
 
 COMMENT=	Programming languages
@@ -96,12 +96,6 @@ SUBDIR+=	gcc8-libs
 SUBDIR+=	gcc9
 SUBDIR+=	gcc9-libs
 SUBDIR+=	gforth
-SUBDIR+=	ghc7
-SUBDIR+=	ghc80
-SUBDIR+=	ghc810
-SUBDIR+=	ghc84
-SUBDIR+=	ghc88
-SUBDIR+=	ghc90
 SUBDIR+=	ghc910
 SUBDIR+=	ghc92
 SUBDIR+=	ghc94