Code Samples: remove "Kotlin Demo" sample as it serves no real purpos… #1186

Job	Run time
Gradle Wrappers	23s
Code Samples / action_basics	3m 20s
Code Samples / comparing_string_references_inspection	3m 19s
Code Samples / conditional_operator_intention	3m 13s
Code Samples / editor_basics	3m 3s
Code Samples / facet_basics	3m 3s
Code Samples / framework_basics	3m 5s
Code Samples / kotlin_demo	14s
Code Samples / live_templates	2m 56s
Code Samples / max_opened_projects	3m 28s
Code Samples / module	3m 6s
Code Samples / project_model	3m 0s
Code Samples / project_view_pane	3m 5s
Code Samples / project_wizard	3m 33s
Code Samples / psi_demo	3m 3s
Code Samples / run_configuration	3m 8s
Code Samples / simple_language_plugin	3m 33s
Code Samples / tool_window	2m 57s
Code Samples / tree_structure_provider	3m 1s
Code Samples Mirror	0s
	54m 30s

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