Re-ignore Ruff rule PLC1901 (#113675)

Re-ignore PLC1901

pyproject.toml

@@ -649,11 +649,7 @@ ignore = [
     "E501", # line too long
     "E731", # do not assign a lambda expression, use a def
 
-    # Ignore ignored, as the rule is now back in preview/nursery, which cannot
-    # be ignored anymore without warnings.
-    # https://github.com/astral-sh/ruff/issues/7491
-    # "PLC1901", # Lots of false positives
-
+    "PLC1901", # {existing} can be simplified to {replacement} as an empty string is falsey; too many false positives
     "PLR0911", # Too many return statements ({returns} > {max_returns})
     "PLR0912", # Too many branches ({branches} > {max_branches})
     "PLR0913", # Too many arguments to function call ({c_args} > {max_args})