remove the last redundant "delete" check in all of fgfs/sg (except JSBSim)

diff --git a/simgear/scene/sky/bbcache.cxx b/simgear/scene/sky/bbcache.cxx
index 26980d1e84c2d0e6bf9f34437012bf615e556b4a..fedfc1fdfc9fe174b7a4eb83dfe83a8fe6e8ce45 100644 (file)
--- a/simgear/scene/sky/bbcache.cxx
+++ b/simgear/scene/sky/bbcache.cxx
@@ -102,8 +102,7 @@ SGBbCache::SGBbCache(void) :
 }
 
 SGBbCache::~SGBbCache(void) {
-       if(rt)
-               delete rt;
+       delete rt;
        freeTextureMemory();
 }