Revert "I added a couple of svg extensions for bug #8234."

This reverts commit 0ae5c4460fcd3eca5274ae01555e7d0a3c4fea80.

This library does not work.
Revert "This fixes #8234.  Added version 1.4.5."

This reverts commit c10065e3c1abeaf55fd77096e785a689c2bcbf5b.

This library does not work.