Remove unnecessary static-base-uri()

[AirQuick]

This pull request just removes static-base-uri() calls which are not necessary.

There is no automated test for format-xspec-report-folding.xsl. So I manually tested this pull request and verified this:

• ant -lib "saxon9ee.jar" -Dxspec.xml=tutorial\escape-for-regex.xspec -Dxspec.html.reporter.xsl=src\reporter\format-xspec-report-folding.xsl generates the same escape-for-regex-result.html as the current master (except for timestamp).

[galtm]

Looks straightforward, and you've covered all the instances of this syntax that I found.

[AirQuick]

@cirulls
Merged this internal cleanup.
I guess you're going to full-or-semi-automate the release note and don't need to be pinged on each merge anymore?

Thanks @galtm for the review.

[cirulls]

Yes, no need to ping me any more, thanks for doing it till now.