misc/androidstudio: drop the clean task to fix Android Studio gradle …

…sync

Suggestion from

golang/go#23307 (comment)

I've manually verified in Android Studio that removing the clean task
does fix the issue reported in golang/go#25290.

Fixes golang/go#25290.
Fixes golang/go#23307.

Change-Id: Ic1a8c240fc8e4c4aaf59977fd559dd221ff605b1
Reviewed-on: https://go-review.googlesource.com/112455
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>

misc/androidstudio/src/main/groovy/org/golang/mobile/GobindPlugin.groovy

@@ -65,10 +65,6 @@ class GobindPlugin implements Plugin<Project> {
 			'mylib',
 			null,
 			gomobileTask))
-
-		Task cleanTask = project.tasks.create("clean", {
-			project.delete(project.name+".aar")
-		})
 	}
 
 	private static void handleVariant(Project project, def variant) {