cleanup special case - xapian doesn't build in CI for 3.13 python

Remove python version checks from xapian script. Keep if: clause that
skips xapian install on 3.13 until we are on ubuntu-24.04 image.

python xapian binding for 1.4.22 looks like it builds correctly on 24.04.

https://github.com/roundup-tracker/roundup/actions/runs/11784123806/job/32822658400

[skip travis]

.github/workflows/ci-test.yml

@@ -256,6 +256,9 @@ jobs:
               pip install Markdown; fi
 
       - name: Install xapian
+        # comment the if: line out once we start running on
+        # ubuntu-24.04. 24.04 has xapian 1.4.22 which builds
+        # correctly with python 3.13.
         if: matrix.python-version != '3.13'
         run: |
           set -xv
@@ -264,11 +267,7 @@ jobs:
           # older python and newest on newer.
           if [[ $PYTHON_VERSION == "2."* ]]; then pip install sphinx==1.8.5; fi
           if [[ $PYTHON_VERSION == '3.'* ]] ; then pip install sphinx; fi
-          if [[ $PYTHON_VERSION != "3.13" ]]; then
-             XAPIAN_VER=$(dpkg -l libxapian-dev | tail -n 1 | awk '{print $3}' | cut -d '-' -f 1); echo $XAPIAN_VER;
-          else
-             XAPIAN_VER="1.4.25"; echo $XAPIAN_VER;
-          fi
+          XAPIAN_VER=$(dpkg -l libxapian-dev | tail -n 1 | awk '{print $3}' | cut -d '-' -f 1); echo $XAPIAN_VER;
           cd /tmp
           curl -s -O https://oligarchy.co.uk/xapian/$XAPIAN_VER/xapian-bindings-$XAPIAN_VER.tar.xz
           tar -Jxvf xapian-bindings-$XAPIAN_VER.tar.xz
@@ -291,7 +290,7 @@ jobs:
             diff -u configure.FCS configure || true; \
             ./configure --prefix=$VIRTUAL_ENV --with-python3 --disable-documentation; \
           fi
-          case "$PYTHON_VERSION" in "3.13") echo skipping xapian build;; *) make && sudo make install; esac
+          make && sudo make install
 
       - name: Test build roundup and install locale so lang tests work.
         run: |