nngpp: remove recipe

nngpp has not had any activity in the last six years and is not
compatible with NNG v2.

Signed-off-by: Nate Kent <nate@nkent.net>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-networking/recipes-connectivity/nanomsg/nngpp/0001-cmake-Bump-minimum-version-to-3.10.patch

@@ -1,25 +0,0 @@
-From c5004770784dc5ff80b88487de38c22275a7960a Mon Sep 17 00:00:00 2001
-From: Khem Raj <raj.khem@gmail.com>
-Date: Sat, 12 Jul 2025 16:04:38 -0700
-Subject: [PATCH] cmake: Bump minimum version to 3.10
-
-Cmake4+ has dropped support for cmake < 3.5 [1]
-
-[1] https://cmake.org/cmake/help/latest/release/4.0.html#deprecated-and-removed-features
-
-Upstream-Status: Submitted [https://github.com/cwzx/nngpp/pull/38]
-Signed-off-by: Khem Raj <raj.khem@gmail.com>
----
- CMakeLists.txt | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index caa7145..45a5ad5 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -1,4 +1,4 @@
--cmake_minimum_required (VERSION 3.1)
-+cmake_minimum_required (VERSION 3.10)
- project(nngpp CXX)
- 
- include(GNUInstallDirs)

meta-networking/recipes-connectivity/nanomsg/nngpp_git.bb

@@ -1,13 +0,0 @@
-DESCRIPTION = "C++ wrapper around the nanomsg NNG API"
-HOMEPAGE = "https://github.com/cwzx/nngpp"
-LICENSE = "MIT"
-LIC_FILES_CHKSUM = "file://license.txt;md5=6d17d78c3597e0d4452fb1c63bf7c58e"
-DEPENDS = "nng"
-
-SRCREV = "8da8c026bd551b7685a8a140909ff96cfe91bf90"
-PV = "1.3.0+git"
-SRC_URI = "git://github.com/cwzx/nngpp;branch=master;protocol=https \
-           file://0001-cmake-Bump-minimum-version-to-3.10.patch \
-          "
-
-inherit cmake

meta-networking/recipes-core/packagegroups/packagegroup-meta-networking.bb

@@ -249,5 +249,4 @@ RDEPENDS:packagegroup-meta-networking-support:remove:libc-musl = "ypbind-mt"
 
 EXCLUDE_FROM_WORLD = "1"
 # Empty packages, only devel headers and libs
-# nngpp
 # Use ntp and not chrony or ntimed