Revert "use static block"

This reverts commit 73ebee2.

Author: diegomarquezp

google-http-client-test/src/main/java/com/google/api/client/test/util/store/AbstractDataStoreFactoryTest.java

@@ -42,13 +42,8 @@
 @RunWith(JUnit4.class)
 public abstract class AbstractDataStoreFactoryTest {
 
-  private static final String STRING_ID;
-  private static final String BOOLEAN_ID;
-
-  static {
-    STRING_ID = "String";
-    BOOLEAN_ID = "Boolean";
-  }
+  private static final String STRING_ID = "String";
+  private static final String BOOLEAN_ID = "Boolean";
   DataStoreFactory dataStore;
   DataStore<String> stringTyped;
   DataStore<Boolean> boolTyped;