HPCC-12569 remove unused files from esp soap binding directory

Signed-off-by: Anthony Fishbeck <anthony.fishbeck@lexisnexis.com>
Merge pull request #6637 from afishbeck/unusedSoapBindingFiles

HPCC-12569 remove unused files from esp soap binding directory

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>