STY: Apply ruff/refurb rule FURB188

FURB188 Prefer `removeprefix` over conditionally replacing with slice.

Author: DimitriPapadopoulos

niworkflows/reports/core.py

@@ -285,7 +285,7 @@ def __init__(
         self.packagename = packagename
         self.subject_id = subject_id
         if subject_id is not None:
-            self.subject_id = subject_id[4:] if subject_id.startswith('sub-') else subject_id
+            self.subject_id = subject_id.removeprefix('sub-')
             self.out_filename = f'sub-{self.subject_id}.html'
 
         # Default template from niworkflows

niworkflows/utils/bids.py

@@ -134,7 +134,7 @@ def collect_participants(bids_dir, participant_label=None, strict=False, bids_va
         participant_label = [participant_label]
 
     # Drop sub- prefixes
-    participant_label = [sub[4:] if sub.startswith('sub-') else sub for sub in participant_label]
+    participant_label = [sub.removeprefix('sub-') for sub in participant_label]
     # Remove duplicates
     participant_label = sorted(set(participant_label))
     # Remove labels not found