Revert "Issue #1089040 by Remon, mlncn: Added Cache rdf_get_namespaces() using drupal_static(). Don't add caches unless there's a demonstrated performance degradation.""

This reverts commit de30adeb.

#915174 by sdboyer, sun: Remove pointless files[] declarations on files that are not declaring classes.

#364470 follow-up by Dave Reid, JohnAlbin, et al: Move submitted by back into a variable. The string approach was too limited.

#933856 by Damien Tournoud: Fixed xpath() return values are inconsistent, leading to failing tests on some environments.

#878092 follow-up by sun,  David_Rothstein: Fixed Regression from D7 alpha: themes are unable to render one group of node links separately from another.

#438224 by dww, sun, netsensei, vordude, et al: 'Post comments without approval' permission name is completely misleading.

#878092 by joachim, Jacine, sun: Fixed Each module is outputting its own ul.links.inline in node links.

#500866 by boombatower, solotandem: Remove t() from assertion messages in SimpleTest, so translators do not get 1000s of bogus strings.

- Patch #632484 by aspilicious, scor, linclark: update the default profile with the proper RDF mapping.

- Patch #690746 by jbrown, Ognyan Kulev, Crell, MichaelCole, Damien Tournoud: text column type doesn't reliably hold serialized variables.

#721082 by scor, linclark: Fixed Prevent conflicting namespaces and move hook_rdf_namespaces() invocation into rdf.module.

- Patch #348448 by mfb, c960657, marvil07, cdale, jpmckinney: fixed PHP strict warnings when running tests and for PHP 5.3.

- Patch #699440 by scor, effulgentsia, noahb, catch: add bundle support to entity_uri() callback to remove performance overhead of forum_url_outbound_alter().