samples: Don't check for location (#809)

Vision is moving back and forth between knowing the image and thinking
it’s in Ancient Rome.  Let’s not test such things.

Author: lesv

vision/snippets/src/test/java/com/example/vision/DetectIT.java

@@ -237,7 +237,6 @@ public void detectWebAnnotations() throws Exception {
     // Assert
     String got = bout.toString();
     assertThat(got).contains("Palace");
-    assertThat(got).contains("Francisco");
   }
 
   @Test
@@ -249,7 +248,6 @@ public void detectWebAnnotationsGcs() throws Exception {
     // Assert
     String got = bout.toString();
     assertThat(got).contains("Palace");
-    assertThat(got).contains("Francisco");
   }
 
   @Test