Migrate blaze from their own duplicated copy of MoreAsserts and use Truth instead.

--
MOS_MIGRATED_REVID=107480889
diff --git a/src/test/java/com/google/devtools/build/lib/vfs/PathFragmentTest.java b/src/test/java/com/google/devtools/build/lib/vfs/PathFragmentTest.java
index d648ba8..26e15cb 100644
--- a/src/test/java/com/google/devtools/build/lib/vfs/PathFragmentTest.java
+++ b/src/test/java/com/google/devtools/build/lib/vfs/PathFragmentTest.java
@@ -24,7 +24,6 @@
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Lists;
 import com.google.common.testing.EqualsTester;
-import com.google.devtools.build.lib.testutil.MoreAsserts;
 import com.google.devtools.build.lib.testutil.TestUtils;
 import com.google.devtools.build.lib.vfs.inmemoryfs.InMemoryFileSystem;
 
@@ -477,7 +476,7 @@
                        -1 * Integer.signum(y.compareTo(x)));
           // Transitivity
           if (x.compareTo(y) > 0 && y.compareTo(z) > 0) {
-            MoreAsserts.assertGreaterThan(0, x.compareTo(z));
+            assertThat(x.compareTo(z)).isGreaterThan(0);
           }
           // "Substitutability"
           if (x.compareTo(y) == 0) {