Yes it is. The Hollywood Blvd. PE line...
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...continued west for a few blocks along Hawthorn Street and then veered back onto its own right-of-way diagonally southwest, going in between houses. If you look at the satellite map on Google for the intersection of Sunset and Gardner, you can clearly see the old PE right-of-way. In fact at that intersection, the right-of-way exists on the NE corner as a driveway into a parking lot behind the Moun of Tunis Moroccan restaurant.
Here's an old map from 1953:
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1950s
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Sunset and Gardner, 1950s:
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