nokia_rx51: Remove platform

This platform is behind on migrations (it is the sole user of the oldest
legacy version of the USB gadget stack and is long overdue for
migration) and with Pali no longer being a maintainer, we remove this
platform.

Signed-off-by: Tom Rini <trini@konsulko.com>

.azure-pipelines.yml

@@ -179,25 +179,6 @@ stages:
           # seems to hang forever with pre-configured "container" environment
           docker run -v $PWD:$(work_dir) $(ci_runner_image) /bin/bash $(work_dir)/build.sh
 
-  - job: nokia_rx51_test
-    displayName: 'Run tests for Nokia RX-51 (aka N900)'
-    pool:
-      vmImage: $(ubuntu_vm)
-    container:
-      image: $(ci_runner_image)
-      options: $(container_option)
-    steps:
-      - script: |
-          mkdir nokia_rx51_tmp
-          ln -s /opt/nokia/u-boot-gen-combined nokia_rx51_tmp/
-          ln -s /opt/nokia/qemu-n900.tar.gz nokia_rx51_tmp/
-          ln -s /opt/nokia/kernel_2.6.28-20103103+0m5_armel.deb nokia_rx51_tmp/
-          ln -s /opt/nokia/libc6_2.5.1-1eglibc27+0m5_armel.deb nokia_rx51_tmp/
-          ln -s /opt/nokia/busybox_1.10.2.legal-1osso30+0m5_armel.deb nokia_rx51_tmp/
-          ln -s /opt/nokia/qemu-system-arm nokia_rx51_tmp/
-          export PATH=/opt/gcc-13.1.0-nolibc/arm-linux-gnueabi/bin:$PATH
-          test/nokia_rx51_test.sh
-
   - job: pylint
     displayName: Check for any pylint regressions
     pool: