package/libolm: remove package

Upstream has explicitely stated that libolm is now deprecated.
Since no other package depend on libolm, we can easily remove it from
Buildroot. If any user is interested in this feature, we can add its
successor: vodozemac.

More information here:
https://gitlab.matrix.org/matrix-org/olm#important-libolm-is-now-deprecated

Also, there is CVE reported on this latest 3.2.16 version declared
as no longer maintained. See:
https://www.cve.org/CVERecord?id=CVE-2024-45191
https://www.cve.org/CVERecord?id=CVE-2024-45192
https://www.cve.org/CVERecord?id=CVE-2024-45193

Signed-off-by: Titouan Christophe <titouan.christophe@mind.be>
[Julien: add a note about CVE reported on this package]
Signed-off-by: Julien Olivain <ju.o@free.fr>

Config.in.legacy

@@ -146,6 +146,13 @@ endif
 
 comment "Legacy options removed in 2025.08"
 
+config BR2_PACKAGE_LIBOLM
+	bool "libolm has been removed"
+	select BR2_LEGACY
+	help
+	  libolm is deprecated and has been removed from Buildroot.
+	  https://gitlab.matrix.org/matrix-org/olm#important-libolm-is-now-deprecated
+
 config BR2_PACKAGE_LIBWEBSOCK
 	bool "libwebsock has been removed"
 	select BR2_LEGACY

DEVELOPERS

@@ -1267,7 +1267,6 @@ F:	package/httping/
 F:	package/iozone/
 F:	package/leptonica/
 F:	package/libeXosip2/
-F:	package/libolm/
 F:	package/libosip2/
 F:	package/ocrad/
 F:	package/opencl-clhpp/

package/Config.in

@@ -1630,7 +1630,6 @@ menu "Crypto"
 	source "package/libmd/Config.in"
 	source "package/libmhash/Config.in"
 	source "package/libnss/Config.in"
-	source "package/libolm/Config.in"
 	source "package/libp11/Config.in"
 	source "package/libscrypt/Config.in"
 	source "package/libsecret/Config.in"

package/libolm/Config.in

@@ -1,12 +0,0 @@
-config BR2_PACKAGE_LIBOLM
-	bool "libolm"
-	depends on BR2_INSTALL_LIBSTDCPP
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 # C++11
-	help
-	  libolm is an implementation of the Double Ratchet
-	  cryptographic ratchet in C++
-
-	  https://gitlab.matrix.org/matrix-org/olm
-
-comment "libolm needs a toolchain w/ C++, gcc >= 4.8"
-	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_8

package/libolm/libolm.hash

@@ -1,3 +0,0 @@
-# locally computed
-sha256  1e90f9891009965fd064be747616da46b232086fe270b77605ec9bda34272a68  olm-3.2.16.tar.gz
-sha256  0d542e0c8804e39aa7f37eb00da5a762149dc682d7829451287e11b938e94594  LICENSE

package/libolm/libolm.mk

@@ -1,18 +0,0 @@
-################################################################################
-#
-# libolm
-#
-################################################################################
-
-LIBOLM_VERSION = 3.2.16
-LIBOLM_SOURCE = olm-$(LIBOLM_VERSION).tar.gz
-LIBOLM_SITE = https://gitlab.matrix.org/matrix-org/olm/-/archive/$(LIBOLM_VERSION)
-LIBOLM_LICENSE = Apache-2.0
-LIBOLM_LICENSE_FILES = LICENSE
-LIBOLM_CPE_ID_VENDOR = matrix
-LIBOLM_CPE_ID_PRODUCT = olm
-LIBOLM_INSTALL_STAGING = YES
-
-LIBOLM_CONF_OPTS = -DOLM_TESTS=OFF
-
-$(eval $(cmake-package))