Remove few more hidden surfaces.

Signed-off-by: Vivian Meazza <vivian.meazza@lineone.net>

Aircraft/Instruments-3d/SCR-522C/BC-602-A.ac

@@ -9844,7 +9844,7 @@ numvert 8
 0.008809 -0.036415 0.023907
 0.008809 -0.033175 0.023906
 0.008794 -0.033175 -0.016621
-numsurf 6
+numsurf 5
 SURF 0x0
 mat 1
 refs 4
@@ -9876,13 +9876,6 @@ refs 4
 SURF 0x0
 mat 1
 refs 4
-2 0.0689189 0.306226
-6 0.068958 0.287091
-7 0.081715 0.287149
-3 0.0816759 0.306285
-SURF 0x0
-mat 1
-refs 4
 4 0.0689189 0.306226
 0 0.056162 0.306285
 3 0.0561228 0.287149
@@ -11062,7 +11055,7 @@ numvert 8
 0.017093 0.013939 0.026892
 -0.051722 0.013939 0.026892
 -0.051722 0.013939 0.024934
-numsurf 6
+numsurf 5
 SURF 0x0
 mat 1
 refs 4
@@ -11098,13 +11091,6 @@ refs 4
 6 0.446707 0.119872
 7 0.446707 0.119872
 3 0.446707 0.0237016
-SURF 0x0
-mat 1
-refs 4
-4 0.68277 0.119872
-0 0.68277 0.0237016
-3 0.446707 0.0237016
-7 0.446707 0.119872
 kids 0
 OBJECT poly
 name "red-placard.001"
@@ -11180,7 +11166,7 @@ numvert 8
 0.017507 0.049804 0.026892
 -0.051309 0.049804 0.026892
 -0.051309 0.049804 0.024934
-numsurf 6
+numsurf 5
 SURF 0x0
 mat 1
 refs 4
@@ -11216,13 +11202,6 @@ refs 4
 6 0.178133 0.123206
 7 0.178133 0.123206
 3 0.178133 0.0244819
-SURF 0x0
-mat 1
-refs 4
-4 0.413265 0.123206
-0 0.413265 0.0244819
-3 0.178133 0.0244819
-7 0.178133 0.123206
 kids 0
 OBJECT poly
 name "rivet-1"
@@ -15889,7 +15868,7 @@ numvert 8
 -0.043537 -0.036418 0.018775
 -0.043538 -0.033178 0.018775
 -0.043549 -0.033178 -0.011956
-numsurf 6
+numsurf 5
 SURF 0x0
 mat 1
 refs 4
@@ -15921,13 +15900,6 @@ refs 4
 SURF 0x0
 mat 1
 refs 4
-2 0.0647695 0.332299
-6 0.0648113 0.311895
-7 0.0784138 0.311958
-3 0.0783721 0.332362
-SURF 0x0
-mat 1
-refs 4
 4 0.0647695 0.332299
 0 0.051167 0.332362
 3 0.0511253 0.311958