It is normal to have engine oil and some varnish on the camshaft sensor actuator

Completely normal as the camshaft is constantly being oiled by the valve-train. The sensor is also in that same oil path. It depends on which cam sensor you are talking about. There are the ones for the VVT system that tell the computer what degree the camshafts are at as the system operates and there is the base cam sensor that tells the ECM which cylinder is where, that one works with the crankshaft sensor to alter timing and can effect the way the engine starts. However, it will also set a code if it's a problem. No real reason to remove it unless it is showing a related code.

Steve. Thank you very much. The truck seems to start better cold. And doesn't seem to stall out while running it. I was beginning to think a timing chain problem but putting this on hold. The sensor was the one on right side upper location of the engine and very accessible. It was metal with screens.

Okay, that would be the actuator itself. It is the part that changes the cam timing using oil pressure so it has oil going through it whenever the engine is running.
Starting better cold sounds more like a vacuum leak. Is the CEL on?