^I understand why people are doing this your 1) is irrelevant.
Saving realty? give me a break, you are ALREADY removing the damn air pump, valve with no sensor, driver's side line, rubber hoses.
You are not saving any space by leaving the under manifold passenger line and its valve, they are hidden, it is not precious realty...and will save a lot people headaches and potentially save a lot of other issues than can go wrong by removing the passenger line, uppipe, manifold, etc.
And for people who claim leaving weight savings on the table, valve weighs only 1 lb, and you are talking to a guy whose 2007 Forester weighs close to 3,000 lbs thanks to weight savings, so yeah weight savings are important to me too, just this time it is not worth it. I am more than satisfied having shed 8 lbs on the air pump, sensorless valve, driver's pipe, hoses.
Let's start giving people sound advice for 2007 vehicles: leave pressure sensor valve and passenger line alone and block-off with $3 Subaru plate sandwiched between them. For all vehicles: Remove: air pump, valve with no sensor (2-pin valve), driver's side line and hoses and block driver's side head with a 2nd Subaru $3 plate, remove codes with Accessport Tuner Race free program, Romraider with Tactrix, or contact tuner.