fix(ios): remove hacky kroll-leftovers on app-termination

[hansemannn]

JIRA: https://jira.appcelerator.org/browse/TIMOB-26946

This was added 9 years ago here and does not cause issues with the JSCore / main-thread based architecture anymore.

Note: No new unit tests applicable, so requesting the no tests flag here.

[build]

	Fails
🚫	🔬 There are library changes, but no changes to the unit tests. That's OK as long as you're refactoring existing code, but will require an admin to merge this PR. Please see README.md#unit-tests for docs on unit testing.

	Messages
📖	👍 Hey!, You deleted more code than you added. That's awesome!
📖	💾 Here's the generated SDK zipfile.
📖	🎉 Another contribution from our awesome community member, hansemannn! Thanks again for helping us make Titanium SDK better. 👍
📖	✅ All tests are passing Nice one! All 3633 tests are passing.

Generated by 🚫 dangerJS against 31aace3

[build]

	Messages
📖	👍 Hey!, You deleted more code than you added. That's awesome!
📖	💾 Here's the generated SDK zipfile.
📖	🎉 Another contribution from our awesome community member, hansemannn! Thanks again for helping us make Titanium SDK better. 👍
📖	✅ All tests are passing Nice one! All 3793 tests are passing. (There are 466 tests skipped)

Generated by 🚫 dangerJS against bfb7f99

[keerthi1032]

FR passed. Not showing last screen on relaunch ,App launched correctly after relaunching.
Test Environment:
Operating System
Name = Mac OS X
Version = 10.13.6
Node.js
Node.js Version = 8.9.1
npm Version = 5.5.1
Titanium CLI
CLI Version = 5.1.1
Studio =5.1.2.201903111843
Titanium SDK
SDK Version = local 8.1.0.v20190418111319 build
Device = iPhone 6s iOS 12, iPhone XS Max
Simulator = iPhone 6 iOS 12, iPhone 6s iOS 11
CLI=7.0.11-70X.1