removed some eclipse warnings

gson/src/main/java/com/google/gson/internal/Streams.java

@@ -68,6 +68,7 @@ public final class Streams {
     TypeAdapters.JSON_ELEMENT.write(writer, element);
   }
 
+  @SuppressWarnings("resource")
   public static Writer writerForAppendable(Appendable appendable) {
     return appendable instanceof Writer ? (Writer) appendable : new AppendableWriter(appendable);
   }

gson/src/test/java/com/google/gson/VersionExclusionStrategyTest.java

@@ -49,7 +49,6 @@ public class VersionExclusionStrategyTest extends TestCase {
   @Since(VERSION)
   private static class MockObject {
 
-    @SuppressWarnings("unused")
     @Since(VERSION)
     public final int someField = 0;
   }

gson/src/test/java/com/google/gson/functional/ExposeFieldsTest.java

@@ -110,7 +110,6 @@ public class ExposeFieldsTest extends TestCase {
     assertNotNull(obj.interfaceField);
   }
 
-  @SuppressWarnings("unused")
   private static class ClassWithExposedFields {
     @Expose private final Integer a;
     private final Integer b;

gson/src/test/java/com/google/gson/internal/LinkedHashTreeMapTest.java

@@ -67,7 +67,6 @@ public final class LinkedHashTreeMapTest extends TestCase {
     } catch (ClassCastException expected) {}
   }
 
-  @SuppressWarnings("SuspiciousMethodCalls")
   public void testContainsNonComparableKeyReturnsFalse() {
     LinkedHashTreeMap<String, String> map = new LinkedHashTreeMap<String, String>();
     map.put("a", "android");

gson/src/test/java/com/google/gson/internal/LinkedTreeMapTest.java

@@ -16,16 +16,16 @@
 
 package com.google.gson.internal;
 
-import com.google.gson.common.MoreAsserts;
-
-import junit.framework.TestCase;
-
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Iterator;
 import java.util.Map;
 import java.util.Random;
 
+import junit.framework.TestCase;
+
+import com.google.gson.common.MoreAsserts;
+
 public final class LinkedTreeMapTest extends TestCase {
 
   public void testIterationOrder() {
@@ -67,7 +67,6 @@ public final class LinkedTreeMapTest extends TestCase {
     } catch (ClassCastException expected) {}
   }
 
-  @SuppressWarnings("SuspiciousMethodCalls")
   public void testContainsNonComparableKeyReturnsFalse() {
     LinkedTreeMap<String, String> map = new LinkedTreeMap<String, String>();
     map.put("a", "android");