[clang] [lld] [llvm] Remove `urllib2` and `SocketServer` (PR #120723)

[Vinay Deshmukh via llvm-commits]

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@@ -39,7 +36,6 @@ def url_is_up(url):
 
 
 def start_browser(port, options):
-    import webbrowser
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vinay-deshmukh wrote:

Due to this import, the import on L17 is unused.

let me know if keeping this one and removing the import from L17 is more preferable.

https://github.com/llvm/llvm-project/pull/120723