[Bug?]: yarn-cli does not recognize "CI=false"

[smartrejames]

Self-service

• I'd be willing to implement a fix

Describe the bug

yarn-cli does not recognize the environment variable CI=false. This leads to unexpected behavior when trying to run certain commands in environments where CI is not set to true.

To reproduce

1. Open a terminal.
2. Set the environment variable CI to false: export CI=false
3. Run any yarn-cli command that should be affected by the CI environment variable, for example:

   remove yarn.lock && yarn install
   

Environment

System:
    OS: macOS 14.5
    CPU: (10) arm64 Apple M1 Pro
  Binaries:
    Node: 20.15.0 - /private/var/folders/vp/v2gwm71s16b16xg4w444zjjm0000gn/T/xfs-da6c39be/node
    Yarn: 4.3.1 - /private/var/folders/vp/v2gwm71s16b16xg4w444zjjm0000gn/T/xfs-da6c39be/yarn
    npm: 10.7.0 - /opt/homebrew/opt/node@20/bin/npm

Additional context

No response