bazel/tasks.ts cleanup should be done

[thomasvl]

bazel/tasks.ts has a cleanup note releated to microsoft/vscode#63951, that issue was fixed in Dec 2018, so the cleanup work should likely be done now.

[thomasvl]

Code reference in question –

https://github.com/bazelbuild/vscode-bazel/blob/8fbcd2769228731827c4b7c2ba3bbc36bb1f5e34/src/bazel/tasks.ts#L67-L68