This commit cleans up reminders of the node-js test suite removal
by removing the test/node folder.
The test structure has been aligned by moving all tests from
* test/spec/browser to test/spec
* test/spec/integration to test/integration
This commit introduces a clean separation of node and browser tests.
ALL tests should be organized according to where they are run
non browser (áka node tests): `test/spec/node`
browser tests: `test/spec/browser`