preservation: remove SensorSurface `RINDEX` tables

this commit is for preservation only; likely it will be our last commit
to this repo

compact/optical_materials.xml

@@ -1086,16 +1086,6 @@
         4*eV  1
         7*eV  1
         "/>
-      <property name="IMAGINARYRINDEX" coldim="2" values="
-        1*eV  1.69
-        4*eV  1.69
-        7*eV  1.69
-        "/>
-      <property name="REALRINDEX" coldim="2" values="
-        1*eV  1.92
-        4*eV  1.92
-        7*eV  1.92
-        "/>
     </opticalsurface>
     <opticalsurface name="SensorSurface_PFRICH" model="glisur" finish="polished" type="dielectric_dielectric">
       <property name="EFFICIENCY" coldim="2" values="