fix: pin to version of flow-remove-types

[gregjopa]

flow-remove-types was recently updated which seems to have broken our npm run release task (ex: https://github.com/paypal/paypal-sdk-client/actions/runs/11463927109/job/31898934970). This PR should fix the following flow error:

Error -------------------------------------------- node_modules/hermes-parser/dist/traverse/getVisitorKeys.js.flow:18:50

Unexpected identifier, expected the token `{`

   18| export function isNode(thing: mixed) /*: implies thing is {+[string]: mixed} */ {