Replace MoreAsserts.assertThrows with Assert.assertThrows

Generated with grep, sed, and some magic.

PiperOrigin-RevId: 303339760
diff --git a/src/test/java/com/google/devtools/build/lib/unix/NativePosixFilesTest.java b/src/test/java/com/google/devtools/build/lib/unix/NativePosixFilesTest.java
index 8b32295..b331c10 100644
--- a/src/test/java/com/google/devtools/build/lib/unix/NativePosixFilesTest.java
+++ b/src/test/java/com/google/devtools/build/lib/unix/NativePosixFilesTest.java
@@ -14,8 +14,8 @@
 package com.google.devtools.build.lib.unix;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.devtools.build.lib.testutil.MoreAsserts.assertThrows;
 import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.junit.Assert.assertThrows;
 import static org.junit.Assert.fail;
 import static org.junit.Assume.assumeTrue;