Deleted activation.jar, removed javax.inject.jar from build path.

Guice only requires javax.inject.jar at runtime.

briar-core/.classpath

@@ -2,12 +2,10 @@
 <classpath>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5"/>
-	<classpathentry kind="lib" path="libs/activation.jar"/>
 	<classpathentry kind="lib" path="libs/bluecove-2.1.0-briar.jar"/>
 	<classpathentry kind="lib" path="libs/bluecove-gpl-2.1.0.jar"/>
 	<classpathentry kind="lib" path="libs/commons-io-2.0.1.jar"/>
 	<classpathentry kind="lib" path="libs/h2small-1.3.161.jar"/>
-	<classpathentry kind="lib" path="libs/javax.inject.jar"/>
 	<classpathentry kind="lib" path="libs/jna-3.5.1.jar"/>
 	<classpathentry kind="lib" path="libs/jnotify-0.93.jar"/>
 	<classpathentry kind="lib" path="libs/jssc-0.9-briar.jar" sourcepath="libs/source/jssc-0.9-briar-source.jar"/>