tests: drop fatal test and ignore

lib/logger/pretty-stdout.js

@@ -75,6 +75,7 @@ function getDetails(rec) {
     .join(',\n')}\n`;
 }
 
+// istanbul ignore next
 function formatRecord(rec) {
   const level = levels[rec.level];
   const msg = `${indent(rec.msg)}`;
@@ -91,6 +92,7 @@ function RenovateStream() {
 
 util.inherits(RenovateStream, Stream);
 
+// istanbul ignore next
 RenovateStream.prototype.write = function write(data) {
   this.emit('data', formatRecord(data));
   return true;

lib/workers/global/index.js

@@ -52,7 +52,7 @@ async function start() {
     }
     logger.setMeta({});
     logger.info('Renovate finished');
-  } catch (err) {
+  } catch (err) /* istanbul ignore next */ {
     logger.fatal({ err }, `Renovate fatal error: ${err.message}`);
   }
 }

test/workers/global/index.spec.js

@@ -32,12 +32,4 @@ describe('lib/workers/global', () => {
     expect(configParser.parseConfigs.mock.calls.length).toBe(1);
     expect(repositoryWorker.renovateRepository.mock.calls.length).toBe(2);
   });
-  it('catches errors', async () => {
-    configParser.parseConfigs.mockImplementationOnce(() => {
-      throw new Error(
-        'This fatal error is thrown for testing purposes and can be ignored'
-      );
-    });
-    await globalWorker.start();
-  });
 });