test: remove redundant tests

They test something already tested and they should actually test the
interplay between 'prompt' and 'applyAnswers' than the 'applyAnswers'
alone. This should be handled by integration tests in the future.

test/unit/init/applyAnswers-test.js

@@ -54,22 +54,10 @@ describe('init._applyAnswers()', () => {
     const config = applyAnswers(createConfig(), { apiaryApiKey: '1234' });
     assert.equal(config.custom.apiaryApiKey, '1234');
   });
-  it('keeps the Apiary API key if already present in the config', () => {
-    const config = applyAnswers(Object(createConfig()), {
-      custom: { apiaryApiKey: '1234' }
-    });
-    assert.equal(config.custom.apiaryApiKey, '1234');
-  });
   it('sets the Apiary API name if provided', () => {
     const config = applyAnswers(createConfig(), { apiaryApiName: 'myproject' });
     assert.equal(config.custom.apiaryApiName, 'myproject');
   });
-  it('keeps the Apiary API name if already present in the config', () => {
-    const config = applyAnswers(Object(createConfig()), {
-      custom: { apiaryApiName: 'myproject' }
-    });
-    assert.equal(config.custom.apiaryApiName, 'myproject');
-  });
   it('creates selected CI configuration if asked', () => {
     applyAnswers(createConfig(), { createCI: 'wercker' }, { ci });
     assert.isTrue(ci.wercker.calledOnce);