fix(core): remove unnecessary corepack defaults (#30992)

These defaults are unnecessary and can be removed.

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## Current Behavior
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Fixes #

.nx/workflows/agents.yaml

@@ -7,8 +7,6 @@ launch-templates:
       GIT_AUTHOR_NAME: Test
       GIT_COMMITTER_EMAIL: test@test.com
       GIT_COMMITTER_NAME: Test
-      COREPACK_DEFAULT_TO_LATEST: '0'
-      COREPACK_ENABLE_AUTO_PIN: '0'
       SELECTED_PM: 'pnpm'
 
       NX_NATIVE_LOGGING: 'nx::native::db'