Uninstall on android wear
Your instructions are almost correct. The one thing you need to remember is that the command you specified in step 4, namely adb -s localhost: 4444, is to be repeated each time you wish to perform some kind of action towards the Wear device.

Therefore, you simply change step 6 to adb -s localhost: 4444 uninstall [package_name]

Bear in mind that step 5 will produce packages that look something like package:com.google.android.music. Be sure that, in step 5, you simply put com.google.android.music where [package_name] should be.

Hope this helps! More information here.