Removed documentation for non-existant Vessel suffixes (#3137)

Author: sisve

doc/source/structures/vessels/vessel.rst

@@ -88,9 +88,6 @@ Vessels are also :ref:`Orbitable<orbitable>`, and as such have all the associate
     :attr:`CONNECTION`                       :struct:`Connection`            Returns your connection to this vessel
     :attr:`MESSAGES`                         :struct:`MessageQueue`          This vessel's message queue
     :attr:`DELTAV`                           :struct:`Scalar` (m/s)          The total delta-v of this vessel in its current situation
-    :attr:`DELTAVASL`                        :struct:`Scalar` (m/s)          The total delta-v of this vessel if it were at sea level
-    :attr:`DELTAVVACUUM`                     :struct:`Scalar` (m/s)          The total delta-v of this vessel if it were in a vacuum
-    :attr:`BURNTIME`                         :struct:`Scalar` (s)            The total burn time of this vessel (or 5 if the vessel has 0 delta/v).
     ======================================== =============================== =============
 
 .. note::
@@ -661,30 +658,6 @@ Vessels are also :ref:`Orbitable<orbitable>`, and as such have all the associate
     calculations the KSP game shows in the staging list.  Note that this is only
     as accurate as the stock KSP game's numbers are.
 
-.. attribute:: Vessel:DELTAVASL
-
-    :return: :struct:`Scalar`
-
-    The total delta-v of this vessel if it were at sea level, using the stock
-    calculations the KSP game shows in the staging list.  Note that this is only
-    as accurate as the stock KSP game's numbers are.
-
-.. attribute:: Vessel:DELTAVVACUUM
-
-    :return: :struct:`Scalar`
-
-    The total delta-v of this vessel if it were at sea vacuum, using the stock
-    calculations the KSP game shows in the staging list.  Note that this is only
-    as accurate as the stock KSP game's numbers are.
-
-.. attribute:: Vessel:BURNTIME
-
-    :return: :struct:`Scalar`
-
-    The total burn time, in seconds, of this vessel (or 5 if the vessel has 0 delta/v). Burn time is not affected by atmosphere.  This is using the stock
-    calculations the KSP game shows in the staging list.  Note that this is only
-    as accurate as the stock KSP game's numbers are.
-
 
 Deprecated Suffix
 -----------------