Fix 'dead store' warnings raised by FindBugs

Remove assignments to unused variables in test cases.

Change-Id: Id0be8f249c1b004c1097309d52e3245a6982e3e4

src/test/java/com/google/gwtorm/nosql/IndexFunctionTest.java

diff --git a/src/test/java/com/google/gwtorm/nosql/IndexFunctionTest.java b/src/test/java/com/google/gwtorm/nosql/IndexFunctionTest.java
index ff827ba..4db5e85 100644
--- a/src/test/java/com/google/gwtorm/nosql/IndexFunctionTest.java
+++ b/src/test/java/com/google/gwtorm/nosql/IndexFunctionTest.java
@@ -72,9 +72,6 @@
 
     p = new Person(new Person.Key(null), 0);
     assertFalse(idx.includes(p));
-
-    b = new IndexKeyBuilder();
-    assertFalse(idx.includes(p));
   }
 
   @Test

src/test/java/com/google/gwtorm/protobuf/ProtobufEncoderTest.java

diff --git a/src/test/java/com/google/gwtorm/protobuf/ProtobufEncoderTest.java b/src/test/java/com/google/gwtorm/protobuf/ProtobufEncoderTest.java
index bca38ee..78f1938 100644
--- a/src/test/java/com/google/gwtorm/protobuf/ProtobufEncoderTest.java
+++ b/src/test/java/com/google/gwtorm/protobuf/ProtobufEncoderTest.java
@@ -79,8 +79,6 @@
     assertNull(a.location());
 
     Person.Key k = new Person.Key("bob");
-    @SuppressWarnings("unused")
-    Person p = new Person(k, 42);
     Address b = new Address(new Address.Key(k, "ny"), "ny");
 
     byte[] act = e.encodeToByteArray(b);