[GC] Removed a manual GC run from run_thaw().  When loading a lot of PBC files, this is just busy work that rarely finds any PObjs to recycle.  (If we had a generational GC, that would be more appropriate here.)  Deleting this line improves Rakudo startup by 6.06% and the 10k subs benchmark by 7.12%.
[GC] Removed a manual GC run from run_thaw().  When loading a lot of PBC files,
this is just busy work that rarely finds any PObjs to recycle.  (If we had a
generational GC, that would be more appropriate here.)  Deleting this line
improves Rakudo startup by 6.06% and the 10k subs benchmark by 7.12%.

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@39227 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

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