As https://github.com/sdkman/sdkman-cli/discussions/1170 delete the contents of .sdkman/libexec

It is currently working for Sdkman 5.19.0 but it is deprecated

~ $ sdk version

[Deprecation Notice]:
This legacy 'version' command is replaced by a native implementation
and it will be removed in a future release.
Please follow the discussion here:
https://github.com/sdkman/sdkman-cli/discussions/1332

SDKMAN 5.19.0