fix linting errors

[ethanneff]

Problem

Linting was working in 6.17.1, but broken by 6.17.8

Solution

The declare module block is sufficient; the duplicate ambient declarations were unnecessary and caused the issue.
What was happening:

• The declare module "react-native-appsflyer" block (lines 12-417) defines all the types correctly
• The ambient declarations at the bottom were duplicates that originally used any types, causing the linting errors
• TypeScript and ESLint work fine with just the declare module block

Why the original code had both:
The comment mentioned "ESLint's import resolver doesn't recognize exports inside 'declare module' blocks," but modern ESLint with TypeScript support handles this correctly. The ambient declarations were redundant and introduced the any type problem.

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[ethanneff]

should resolve #649