[文本处理] 批处理/sed/gawk中如何删除文本中每行里指定字符后的内容？

飞龙project

下面是一个文件（节选），我想删除每行里以？开头的之后的内容

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:20
#EXT-X-MEDIA-SEQUENCE:0
#EXTINF:17.760000,
http://website/hls/junior/3/1CCMN4CC4D-hls0.ts?auth_key=1582255823-0-0-431c012620e68d9
#EXTINF:6.440000,
http://website/hls/junior/3/1CCMN4CC4D-hls1.ts?auth_key=1582255823-0-0-e68d8911766cc47
#EXTINF:10.000000,
http://website/hls/junior/3/1CCMN4CC4D-hls2.ts?auth_key=1582255823-0-0-02a02b662ed0ca8
·········
#EXTINF:6.040000,
http://website/hls/junior/3/1CCMN4CC4D-hls156.ts?auth_key=1582255823-0-0-4143e53286841c
#EXT-X-ENDLIST
复制代码

变为：

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:20
#EXT-X-MEDIA-SEQUENCE:0
#EXTINF:17.760000,
1CCMN4CC4D-hls0.ts
#EXTINF:6.440000,
1CCMN4CC4D-hls1.ts
#EXTINF:10.000000,
1CCMN4CC4D-hls2.ts
·········
#EXTINF:6.040000,
1CCMN4CC4D-hls156.ts
#EXT-X-ENDLIST
复制代码

其中保留以#开头的内容，谢谢了！