[tree-ssa] Don't declare c_genericize twice

[Steven Bosscher]

c_genericize() was declared in c-tree.h and c-common.h; obvious,
commited.

Index: c-tree.h
===================================================================
RCS file: /cvs/gcc/gcc/gcc/c-tree.h,v
retrieving revision 1.99.2.20
diff -c -3 -p -r1.99.2.20 c-tree.h
*** c-tree.h    31 Aug 2003 16:55:12 -0000      1.99.2.20
--- c-tree.h    8 Sep 2003 04:42:44 -0000
*************** extern void c_write_global_declarations
*** 308,316 ****
  extern GTY(()) tree static_ctors;
  extern GTY(()) tree static_dtors;
   
- /* In c-simplify.c */
- extern void c_genericize (tree);
-
  /* In c-call-graph.c  */
  extern void print_call_graph (FILE*, tree);
  extern void debug_call_graph (tree);
--- 308,313 ----