Do not set eval() globals in ImageMath.unsafe_eval() (#9576)

Author: hugovk

src/PIL/ImageMath.py

@@ -307,7 +307,7 @@ def scan(code: CodeType) -> None:
                 raise ValueError(msg)
 
     scan(compiled_code)
-    out = builtins.eval(expression, {"__builtins": {"abs": abs}}, args)
+    out = builtins.eval(expression, None, args)
     try:
         return out.im
     except AttributeError: