Remove comma from author - biblatex

The punctuation between family and given name in family-given order is controlled by revsdnamepunct, which defaults to a comma. If you don't want that comma, just redefine revsdnamepunct to be empty.

documentclass[british]{article}
usepackage[T1]{fontenc}
usepackage{babel}
usepackage{csquotes}

usepackage[
  style=authoryear-ibid,
  dashed=false,
  terseinits, giveninits
]{biblatex}

renewcommand*{revsdnamepunct}{}

begin{filecontents}{jobname.bib}
@ARTICLE{ipab730bbib2,
  author       = {S. F. Edwards},
  year         = 1967,
  title        = {Statistical Mechanics With Topological Constraints: I},
  journaltitle = {Proc. Phys. Soc.},
  volume       = {91},
  pages        = {513},
}
end{filecontents}
addbibresource{jobname.bib}
addbibresource{biblatex-examples.bib}

begin{document}
Lorem autocite{sigfridsson,ipab730bbib2}

printbibliography
end{document}

---

If you want to retain the space between the initials and only want no dots, remove the terseinits option and add

renewrobustcmd*{bibinitperiod}{}

to the preamble.

documentclass[british]{article}
usepackage[T1]{fontenc}
usepackage{babel}
usepackage{csquotes}

usepackage[
  style=authoryear-ibid,
  dashed=false,
  giveninits
]{biblatex}

renewcommand*{revsdnamepunct}{}
renewrobustcmd*{bibinitperiod}{}

begin{filecontents}{jobname.bib}
@ARTICLE{ipab730bbib2,
  author       = {S. F. Edwards},
  year         = 1967,
  title        = {Statistical Mechanics With Topological Constraints: I},
  journaltitle = {Proc. Phys. Soc.},
  volume       = {91},
  pages        = {513},
}
end{filecontents}
addbibresource{jobname.bib}
addbibresource{biblatex-examples.bib}

begin{document}
Lorem autocite{sigfridsson,ipab730bbib2}

printbibliography
end{document}