Remove unused vm2 dependency

[anthony-c-martin]

Resolves https://github.com/Azure/bicep/security/dependabot/107

Microsoft Reviewers: Open in CodeFlow

[github-actions]

Test this change out locally with the following install scripts (Action run 8157999003)

VSCode

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-vsix.sh) --run-id 8157999003

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-vsix.ps1) } -RunId 8157999003"

Azure CLI

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-cli.sh) --run-id 8157999003

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-cli.ps1) } -RunId 8157999003"

[github-actions]

Test Results

    65 files   -     34      65 suites   - 34   22m 1s ⏱️ - 18m 19s
10 675 tests  -     20  10 674 ✅  -     20  1 💤 ±0  0 ❌ ±0 
25 240 runs   - 12 616  25 238 ✅  - 12 615  2 💤  - 1  0 ❌ ±0 

Results for commit ce0053b. ± Comparison against base commit 0dbe38b.