RM a non-existing file should not fail the script
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Key: PIG-297
URL: https://issues.apache.org/jira/browse/PIG-297
Project: Pig
Issue Type: Improvement
Components: grunt
Reporter: Yiping Han
Priority: Minor
rm is commonly used to remove the existing output before re-execute a script.
However, when the output is not existing, rm will fail and grunt will terminate
the execution. Such a behavior is very inconvenience. Expected grunt behavior
would print some error message and continue to execute the script.
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