(arrow) branch main updated: GH-47640: [CI] Remove needless ci/docker/ubuntu-22.04-csharp.dockerfile (#48298)

[kou]

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The following commit(s) were added to refs/heads/main by this push:
     new 7dda705149 GH-47640: [CI] Remove needless 
ci/docker/ubuntu-22.04-csharp.dockerfile (#48298)
7dda705149 is described below

commit 7dda705149f42ac9e1b8cbbe7bc110981227c7d0
Author: Nic Crane <thisis...@gmail.com>
AuthorDate: Mon Dec 1 23:51:26 2025 +0000

    GH-47640: [CI] Remove needless ci/docker/ubuntu-22.04-csharp.dockerfile 
(#48298)
    
    ### Rationale for this change
    
    Dockerfile is orphaned
    
    ### What changes are included in this PR?
    
    Remove it
    
    ### Are these changes tested?
    
    No
    
    ### Are there any user-facing changes?
    No
    * GitHub Issue: #47640
    
    Authored-by: Nic Crane <thisis...@gmail.com>
    Signed-off-by: Sutou Kouhei <k...@clear-code.com>
---
 ci/docker/ubuntu-22.04-csharp.dockerfile | 28 ----------------------------
 1 file changed, 28 deletions(-)

diff --git a/ci/docker/ubuntu-22.04-csharp.dockerfile 
b/ci/docker/ubuntu-22.04-csharp.dockerfile
deleted file mode 100644
index 4d77ba060b..0000000000
--- a/ci/docker/ubuntu-22.04-csharp.dockerfile
+++ /dev/null
@@ -1,28 +0,0 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License.  You may obtain a copy of the License at
-#
-#   http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied.  See the License for the
-# specific language governing permissions and limitations
-# under the License.
-
-ARG arch=amd64
-ARG dotnet=8.0
-ARG platform=jammy
-FROM mcr.microsoft.com/dotnet/sdk:${dotnet}-${platform}-${arch}
-
-RUN apt-get update -y -q && \
-    apt-get install -y python3 python3-pip && \
-    apt-get clean && \
-    rm -rf /var/lib/apt/lists/*
-
-RUN dotnet tool install --tool-path /usr/local/bin sourcelink