docs: remove setSecure() from net module docs
docs: remove setSecure() from net module docs

socket.setSecure() was removed in v0.3 and there are no deprecated warning in
code it should be removed from the documentation in 0.7

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node