docs(core): remove angularjs migration

[isaacplmann]

Remove angularjs migration guide

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Name	Status	Preview	Updated (UTC)
nx-dev	✅ Ready (Inspect)	Visit Preview	Feb 28, 2024 7:18pm

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✅ Successfully ran 6 targets

• nx affected --target=e2e --base=c7a1a75c78cf91cea532902ce5f5fdd083ca4866 --head=3de08f1a2bd7a086c1635257efcb3f2327a94ba8 --parallel=1
• nx affected --targets=lint,test,build --base=c7a1a75c78cf91cea532902ce5f5fdd083ca4866 --head=3de08f1a2bd7a086c1635257efcb3f2327a94ba8 --parallel=3
• nx run-many -t check-imports check-commit check-lock-files check-codeowners documentation --parallel=1 --no-dte
• nx-cloud record -- nx format:check --base=c7a1a75c78cf91cea532902ce5f5fdd083ca4866 --head=3de08f1a2bd7a086c1635257efcb3f2327a94ba8
• nx documentation --no-dte
• nx affected -t e2e-macos --parallel=1 --base=c7a1a75c78cf91cea532902ce5f5fdd083ca4866 --head=3de08f1a2bd7a086c1635257efcb3f2327a94ba8

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[leosvelperez]

@isaacplmann there are a few other mentions for AngularJS that we should remove:

• https://github.com/nrwl/nx/blob/master/docs/shared/packages/angular/angular-plugin.md?plain=1#L13
• https://github.com/nrwl/nx/blob/master/packages/angular/package.json#L5
• https://github.com/nrwl/nx/blob/master/packages-legacy/angular/package.json#L5
• https://github.com/nrwl/nx/blob/master/docs/shared/mental-model/large-tasks.json#L26182-L26189 (non-important)

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