ChronicleMapCacheIT: remove Truth8 qualifier from assertThat

The 'Truth8.assertThat' is statically imported therefore it doesn't have
to be prefixed with 'Truth8'.

Change-Id: If2cab4d511e439d1144fd3993d9b050506f9fbb2

src/test/java/com/googlesource/gerrit/modules/cache/chroniclemap/ChronicleMapCacheIT.java

diff --git a/src/test/java/com/googlesource/gerrit/modules/cache/chroniclemap/ChronicleMapCacheIT.java b/src/test/java/com/googlesource/gerrit/modules/cache/chroniclemap/ChronicleMapCacheIT.java
index 444762b..389fbb1 100644
--- a/src/test/java/com/googlesource/gerrit/modules/cache/chroniclemap/ChronicleMapCacheIT.java
+++ b/src/test/java/com/googlesource/gerrit/modules/cache/chroniclemap/ChronicleMapCacheIT.java
@@ -17,7 +17,6 @@
 import static com.google.common.truth.Truth8.assertThat;
 
 import com.google.common.cache.Cache;
-import com.google.common.truth.Truth8;
 import com.google.gerrit.acceptance.AbstractDaemonTest;
 import com.google.gerrit.acceptance.UseLocalDisk;
 import com.google.gerrit.entities.Project;
@@ -68,7 +67,7 @@
     String newProjectName = name("newProject");
     adminRestSession.put("/projects/" + newProjectName).assertCreated();
 
-    Truth8.assertThat(projectCache.get(Project.nameKey(newProjectName))).isPresent();
+    assertThat(projectCache.get(Project.nameKey(newProjectName))).isPresent();
   }
 
   @Test