fb: wfbrename: drop unused symbol fbGeneration

Just fallout from mfb removal back 17 years ago.

See: f31bd08
Signed-off-by: Enrico Weigelt, metux IT consult <[email protected]>

Author: metux

fb/wfbrename.h

@@ -54,7 +54,6 @@
 #define fbFixCoordModePrevious wfbFixCoordModePrevious
 #define fbGCFuncs wfbGCFuncs
 #define fbGCOps wfbGCOps
-#define fbGeneration wfbGeneration
 #define fbGetImage wfbGetImage
 #define fbGetScreenPrivateKey wfbGetScreenPrivateKey
 #define fbGetSpans wfbGetSpans