Revert "APIDocumentationTests requires org.eclipse.jdt.core.source

bundle"

This reverts commit 98a6796 as it
doesn't fix the original issue with missing source bundle.

Author: iloveeclipse

org.eclipse.jdt.core.tests.model/build.properties

@@ -24,5 +24,3 @@ src.includes = about.html
 source.. = src/
 output.. = bin/
 javacWarnings..=+fieldHiding,-unavoidableGenericProblems
-# Required for APIDocumentationTests
-additional.bundles = org.eclipse.jdt.core.source