Removed the creation of a temporary pool in the expression parsing

Removed the creation of a temporary pool in the expression parsing
code.  Now that the code no longer allocs huge buffers (based on the
last commit), there's no need to incur the overhead of creating a
temporary pool just to clean up the storage quickly.  This saves
a lot of space (because the temp pool used 8KB) and a small amount
of processing time.

As a side-effect of this change, we don't need the gotos any longer.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@92839 13f79535-47bb-0310-9956-ffa450edef68