Revert "Add missing string include from generatorprofile.h."
Revert "Add missing string include from generatorprofile.h."

This reverts commit 1ad3ff0ed4cfea6341861f41428c2fd26c513fb6.

nickerso/libcellml,MichaelClerx/libcellml,MichaelClerx/libcellml,hsorby/libcellml,hsorby/libcellml,cellml/libcellml,nickerso/libcellml,nickerso/libcellml,MichaelClerx/libcellml,hsorby/libcellml,cellml/libcellml,cellml/libcellml,nickerso/libcellml,cellml/libcellml,hsorby/libcellml