app-doc/dita-ot-bin: remove unused patch

Signed-off-by: Michael Mair-Keimberger <mm1ke@gentoo.org>

app-doc/dita-ot-bin/files/dita-ot-bin-4.2.3-set-java-home.patch

@@ -1,14 +0,0 @@
-dita-ot requires java 17 or higher.
-Set JAVA_HOME accordingly.
-
---- a/bin/dita
-+++ b/bin/dita
-@@ -20,6 +20,8 @@
- # See the License for the specific language governing permissions and
- # limitations under the License.
- 
-+JAVA_HOME=$(java-config-2 --select-vm $(depend-java-query --get-vm '>=virtual/jre:17') -g JAVA_HOME)
-+
- # Extract launch and ant arguments, (see details below).
- ant_exec_args=
- for arg in "$@" ; do