'vue/require-explicit-emits' is enabled in Vue 2

[cloydlau]

Describe the bug

'vue/require-explicit-emits' is a rule for Vue 3 only.

Reproduction

https://github.com/cloydlau/reproduction.git

System Info

System:
    OS: macOS 14.3.1
    CPU: (8) arm64 Apple M2
    Memory: 68.14 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.12.0 - ~/Library/pnpm/node
    Yarn: 1.22.21 - /opt/homebrew/bin/yarn
    npm: 9.6.4 - /opt/homebrew/bin/npm
    pnpm: 8.15.6 - ~/Library/pnpm/pnpm
    bun: 0.5.9 - /opt/homebrew/bin/bun
  Browsers:
    Chrome: 123.0.6312.107
    Safari: 17.3.1

Used Package Manager

pnpm

Validations

• Follow our Code of Conduct
• Read the Contributing Guide.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A, please open a GitHub Discussion instead.
• The provided reproduction is a minimal reproducible of the bug.

[antfu]

PR welcome to fix it. Thanks