All: Remove 1.6.x leftovers

Removes 1.6 versions from "All" tests and from the TestSwarm job.

Ref #10723
Ref jquerygh-1422
Closes jquerygh-1434
Closes jquerygh-1435

Author: morchard

build/tasks/testswarm.js

@@ -7,8 +7,7 @@ var versions = {
 		"1.10": "1.10.0 1.10.1 1.10.2",
 		"1.9": "1.9.0 1.9.1",
 		"1.8": "1.8.0 1.8.1 1.8.2 1.8.3",
-		"1.7": "1.7.0 1.7.1 1.7.2",
-		"1.6": "1.6.0 1.6.1 1.6.2 1.6.3 1.6.4"
+		"1.7": "1.7.0 1.7.1 1.7.2"
 	},
 	tests = {
 		"Accordion": "accordion/accordion.html",

tests/unit/subsuite.js

@@ -1,7 +1,6 @@
 (function() {
 
 var versions = [
-		"1.6.0", "1.6.1", "1.6.2", "1.6.3", "1.6.4",
 		"1.7.0", "1.7.1", "1.7.2",
 		"1.8.0", "1.8.1", "1.8.2", "1.8.3",
 		"1.9.0", "1.9.1",