If you only want to remove the first space, you can do a Search Repository activity within the folder that contains these folders to find only the folders and subfolders that have a single character followed by a space, which would look something like this:

({LF:LOOKIN="\BaseFolder"}) & {LF:name="? *", Type="F"}

Then, within a For Each Entry activity, add a Token Calculator activity to generate the new name (with the first space removed)

Then a Rename Entry activity to rename it using the token you just generated.