Remove problematic export module

[slhad]

Removing declare module "connect-dynamodb" fixes the typescript compilation

$ node -v
v18.16.0

$ tsc -v
Version 5.0.4

$ tsc  --project tsconfig-build.json
node_modules/connect-dynamodb/index.d.ts:10:3 - error TS2666: Exports and export assignments are not permitted in module augmentations.

10   export = ConnectDynamoDB;
     ~~~~~~


Found 1 error in node_modules/connect-dynamodb/index.d.ts:10

[yutak23]

I am also proposing the same modification and a modification to export default.

#84

[ca98am79]

fixed with #84