package/gkrellm: remove client, needs libgtk2

The gkrellm client needs libgtk2, which we are about to drop from
Buildroot.

Even though gkrellm has a somewhat active upstream at
https://git.srcbox.net/gkrellm/gkrellm, it isn't clear whether it is
compatible with Gtk 3 or not.

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
[Arnout: reword help text, drop legacy for BR2_PACKAGE_GKRELLM_SERVER]
Signed-off-by: Arnout Vandecappelle <arnout@rnout.be>

Config.in.legacy

@@ -146,6 +146,13 @@ endif
 
 comment "Legacy options removed in 2025.11"
 
+config BR2_PACKAGE_GKRELLM_CLIENT
+	bool "gkrellm client has been removed"
+	select BR2_LEGACY
+	help
+	  The gkrellm client option has been removed, as it required
+	  libgtk2, which was removed from Buildroot.
+
 config BR2_PACKAGE_CWIID_WMGUI
 	bool "cwiid wmgui has been removed"
 	select BR2_LEGACY

package/gkrellm/Config.in

@@ -3,41 +3,14 @@ config BR2_PACKAGE_GKRELLM
 	depends on BR2_USE_WCHAR # libglib2
 	depends on BR2_TOOLCHAIN_HAS_THREADS # libglib2
 	depends on BR2_USE_MMU # libglib2
-	select BR2_PACKAGE_GKRELLM_SERVER if !BR2_PACKAGE_GKRELLM_CLIENT
 	select BR2_PACKAGE_LIBGLIB2
 	help
-	  GKrellM is a single process stack of system monitors which
-	  supports applying themes to match its appearance to your
-	  window manager, Gtk, or any other theme.
+	  GKrellM is a single process stack of system monitors.
+	  This package only contains the server part. The client
+	  can run on a different machine.
 
 	  http://gkrellm.srcbox.net/
 
-if BR2_PACKAGE_GKRELLM
-
-config BR2_PACKAGE_GKRELLM_SERVER
-	bool "server"
-	help
-	  Enable gkrellm server.
-
-config BR2_PACKAGE_GKRELLM_CLIENT
-	bool "client"
-	depends on BR2_PACKAGE_XORG7 # libgtk2
-	depends on BR2_INSTALL_LIBSTDCPP # libgtk2
-	depends on BR2_TOOLCHAIN_HAS_SYNC_4 # libgtk2
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 # libgtk2
-	select BR2_PACKAGE_LIBGTK2
-	select BR2_PACKAGE_XLIB_LIBSM
-	help
-	  Enable gkrellm client.
-
-comment "client needs a toolchain w/ C++, gcc >= 4.8"
-	depends on BR2_TOOLCHAIN_HAS_SYNC_4
-	depends on BR2_PACKAGE_XORG7
-	depends on !BR2_INSTALL_LIBSTDCPP || \
-		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
-
-endif # BR2_PACKAGE_GKRELLM
-
 comment "gkrellm needs a toolchain w/ wchar, threads"
 	depends on BR2_USE_MMU
 	depends on !BR2_USE_WCHAR || !BR2_TOOLCHAIN_HAS_THREADS

package/gkrellm/gkrellm.mk

@@ -32,19 +32,7 @@ else
 GKRELLM_BUILD_OPTS += enable_nls=0
 endif
 
-ifeq ($(BR2_PACKAGE_GKRELLM_SERVER)$(BR2_PACKAGE_GKRELLM_CLIENT),yy)
-GKRELLM_BUILD_DIR = $(@D)
-else ifeq ($(BR2_PACKAGE_GKRELLM_SERVER),y)
 GKRELLM_BUILD_DIR = $(@D)/server
-else
-GKRELLM_BUILD_DIR = $(@D)/src
-endif
-
-ifeq ($(BR2_PACKAGE_GKRELLM_CLIENT),y)
-GKRELLM_DEPENDENCIES += libgtk2 xlib_libSM
-GKRELLM_BUILD_OPTS += X11_LIBS="-lX11 -lSM -lICE"
-GKRELLM_LICENSE += GPL (base64.c), Public Domain (md5.h, md5c.c)
-endif
 
 define GKRELLM_BUILD_CMDS
 	$(TARGET_CONFIGURE_OPTS) $(TARGET_MAKE_ENV) $(MAKE) \