Remove quiz feature and resolve FIXME comments#152

MihaiCristianCondrea wants to merge 2 commits intomainMihaiCristianCondrea/Android-Studio-Tutorials-Java-Edition:mainfrom

codex/fix-fixme-comments-and-remove-quiz-referencesMihaiCristianCondrea/Android-Studio-Tutorials-Java-Edition:codex/fix-fixme-comments-and-remove-quiz-referencesCopy head branch name to clipboard