remove unused CaloSignalHelper.h file
As discussed on ATLASRECTS-5165 , the file CaloSignalHelper.h isn't included anywhere (after removing some obsolete test-beam code). This MR removes it from the master branch.
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As discussed on ATLASRECTS-5165 , the file CaloSignalHelper.h isn't included anywhere (after removing some obsolete test-beam code). This MR removes it from the master branch.