Revert "Don't crash CLI on exceptions (#2066)" (#2078)

This reverts commit 147834e99c.

ldm/generate.py

@@ -545,7 +545,7 @@ class Generate:
                 print('**Interrupted** Partial results will be returned.')
             else:
                 raise KeyboardInterrupt
-        except (RuntimeError, Exception) as e:
+        except RuntimeError as e:
             print(traceback.format_exc(), file=sys.stderr)
             print('>> Could not generate image.')