Do not call adb kill-server on uninstall

See NativeScript/nativescript-cli#1247

Author: teobugslayer

commands/preuninstall.ts

@@ -17,19 +17,6 @@ export class PreUninstallCommand implements ICommand {
 
 	public execute(args: string[]): IFuture<void> {
 		return (() => {
-			let relativeAdbPath = util.format(PreUninstallCommand.ADB_RELATIVE_PATH, process.platform);
-			let adbPath = path.join(__dirname, relativeAdbPath);
-
-			let killAdbServerCommand = util.format("\"%s\" kill-server", adbPath);
-			this.$logger.warn("Trying to kill adb server. Some running Android related operations may fail.");
-
-			try {
-				this.$childProcess.exec(killAdbServerCommand).wait();
-			} catch(err) {
-				this.$logger.trace(err);
-				this.$logger.warn("Unable to kill adb server.");
-			}
-
 			this.$fs.deleteFile(path.join(this.$options.profileDir, "KillSwitches", "cli")).wait();
 		}).future<void>()();
 	}