Removed SynchronizedDatabaseComponent.

LockFairnessTest passes on Windows, Mac and Linux, so it's safe to use
ReadWriteLockDatabaseComponent on all those platforms. We can revisit
this issue for Android if necessary, but for now it's a waste of
effort to have two parallel implementations.

test/build.xml

@@ -22,7 +22,6 @@
 			<test name='net.sf.briar.db.DatabaseCleanerImplTest'/>
 			<test name='net.sf.briar.db.H2DatabaseTest'/>
 			<test name='net.sf.briar.db.ReadWriteLockDatabaseComponentTest'/>
-			<test name='net.sf.briar.db.SynchronizedDatabaseComponentTest'/>
 			<test name='net.sf.briar.i18n.FontManagerTest'/>
 			<test name='net.sf.briar.i18n.I18nTest'/>
 			<test name='net.sf.briar.invitation.InvitationWorkerTest'/>

test/net/sf/briar/db/SynchronizedDatabaseComponentTest.java

@@ -1,19 +0,0 @@
-package net.sf.briar.db;
-
-import net.sf.briar.api.db.DatabaseComponent;
-
-public class SynchronizedDatabaseComponentTest
-extends DatabaseComponentImplTest {
-
-	@Override
-	protected <T> DatabaseComponent createDatabaseComponent(
-			Database<T> database, DatabaseCleaner cleaner) {
-		return createDatabaseComponentImpl(database, cleaner);
-	}
-
-	@Override
-	protected <T> DatabaseComponentImpl<T> createDatabaseComponentImpl(
-			Database<T> database, DatabaseCleaner cleaner) {
-		return new SynchronizedDatabaseComponent<T>(database, cleaner);
-	}
-}