Fixes #10925

We're sticking with simple for now, an overload can be used if a config object
is necessary later.

This reverts commit 873b3d0b.

Fixes #11332

Revert "added ability to resolve varaibles in configuration settings (variables such as ${workspaceRoot} and ${env...} environment variables"

This reverts commit 9baff519.

added ability to resolve varaibles in configuration settings (variables such as ${workspaceRoot} and ${env...} environment variables

gracefully handle the case in which a delegate command has been disposed before execution, fixes #3265