[committed] Remove unused decl in a test

[Marek Polacek]

Applied.

2015-07-27  Marek Polacek  <pola...@redhat.com>

        * c-c++-common/Wtautological-compare-2.c: Remove unused declaration.

diff --git gcc/testsuite/c-c++-common/Wtautological-compare-2.c 
gcc/testsuite/c-c++-common/Wtautological-compare-2.c
index c8aecef..260d9f7 100644
--- gcc/testsuite/c-c++-common/Wtautological-compare-2.c
+++ gcc/testsuite/c-c++-common/Wtautological-compare-2.c
@@ -2,8 +2,6 @@
 /* { dg-do compile } */
 /* { dg-options "-Wtautological-compare" } */
 
-extern int foo (void);
-
 #define A a
 #define B A
 #define FOO (A > B)

        Marek