Revert "utils: build the dynamic experimental SDK"

[aschwaighofer]

Good chance that this is the cause of https://ci-external.swift.org/job/swift-main-windows-toolchain-arm64/1446/consoleText failure.

2025-08-20T01:16:24.598Z]  (is the command line too long?)
[2025-08-20T01:16:24.598Z] <unknown>:0: warning: using (deprecated) legacy driver, Swift installation does not contain swift-driver at: 'C:\Users\swift-ci\jenkins\workspace\swift-main-windows-toolchain-arm64\build\1\bin\swift-driver-new.exe'

[2025-08-20T01:16:24.598Z] Error: Error: cmake.exe exited with code 1.
[2025-08-20T01:16:24.598Z] Invocation:
[2025-08-20T01:16:24.598Z]   C:\Program Files\CMake\bin\cmake.exe --build T:\x86_64-unknown-windows-msvc\ExperimentalDynamicFoundation --target install

Reverts #83717

[aschwaighofer]

@swift-ci smoke test

[aschwaighofer]

CC @compnerd

[compnerd]

Ugh, I see the issue - its missing an option to the CMake invocation. I can put up a fix in a couple of minutes.

[compnerd]

#83831 should address that break. Sorry about the trouble!

[aschwaighofer]

Okay, thank you.