build: Remove outdated documentation checks
build: Remove outdated documentation checks

These are now performed by gtkdoc-check. Yay!

pwithnall/uhttpmock,Distrotech/uhttpmock,pwithnall/uhttpmock,MathieuDuponchelle/uhttpmock,MathieuDuponchelle/uhttpmock,Distrotech/uhttpmock,MathieuDuponchelle/uhttpmock