MNT: rocket.py removed pointmassrocket inertia

- MNT: removed dry inertia setters from pointmassrocket

Author: aZira371

rocketpy/rocket/rocket.py

@@ -2110,54 +2110,3 @@ def center_of_mass(self):
     @center_of_mass.setter
     def center_of_mass(self, value):
         self._center_of_mass = value
-
-    # ------------------------------------------------------------------
-    # Inertia Properties (always zero)
-    # ------------------------------------------------------------------
-    @property
-    def dry_I_11(self):
-        return 0.0
-
-    @dry_I_11.setter
-    def dry_I_11(self, value):
-        self._dry_I_11 = 0.0
-
-    @property
-    def dry_I_22(self):
-        return 0.0
-
-    @dry_I_22.setter
-    def dry_I_22(self, value):
-        self._dry_I_22 = 0.0
-
-    @property
-    def dry_I_33(self):
-        return 0.0
-
-    @dry_I_33.setter
-    def dry_I_33(self, value):
-        self._dry_I_33 = 0.0
-
-    @property
-    def dry_I_12(self):
-        return 0.0
-
-    @dry_I_12.setter
-    def dry_I_12(self, value):
-        self._dry_I_12 = 0.0
-
-    @property
-    def dry_I_13(self):
-        return 0.0
-
-    @dry_I_13.setter
-    def dry_I_13(self, value):
-        self._dry_I_13 = 0.0
-
-    @property
-    def dry_I_23(self):
-        return 0.0
-
-    @dry_I_23.setter
-    def dry_I_23(self, value):
-        self._dry_I_23 = 0.0