res: Removed curl-based translation pull script.

Found out you can use the transifex client from cygwin. Here's how:

1. Install cygwin

2. Install package 'python-setuptools' using the cygwin setup tool

3. Open cygwin terminal and stay in the home directory

4. Install transifex client by typing
     easy_install --upgrade transifex-client

5. Initialize transifex client configuration by typing
     tx init

To pull the latest translations, navigate to your mupen64plus-ae
working directory and type
     ./pull-translations.sh