fix a test

app/src/androidTest/java/com/geeksville/mesh/ChannelTest.kt

@@ -1,7 +1,5 @@
 package com.geeksville.mesh
 
-
-import androidx.compose.frames.open
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.geeksville.mesh.model.Channel
 import org.junit.Assert
@@ -12,11 +10,9 @@ import org.junit.runner.RunWith
 class ChannelTest {
     @Test
     fun channelUrlGood() {
-        open() // Needed to make Compose think we are inside a Frame
         val ch = Channel.emulated
 
         Assert.assertTrue(ch.getChannelUrl().toString().startsWith(Channel.prefix))
         Assert.assertEquals(Channel(ch.getChannelUrl()), ch)
     }
-
 }