[gdb/testsuite] Remove duplicate of supports_gnuc

In commit 9d9dd861e98 ("[gdb/testsuite] Fix regression in
step-indirect-call-thunk.exp with gcc 7") I accidentally committed a duplicate
of supports_gnuc, which caused:
...
DUPLICATE: gdb.base/gdb-caching-proc.exp: supports_gnuc: consistency
...

Fix this by removing the duplicate.

Tested on x86_64-linux.

diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
index ef68c3ce9fbb72f8064c08e1f784c624ded12e56..a8f25b5f0dd51a1aeb027ccd1d3ede333d387398 100644 (file)
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -8529,17 +8529,6 @@ gdb_caching_proc supports_gnuc {
     return [gdb_simple_compile $me $src object ""]
 }
 
-# Return 1 if compiler supports __GNUC__, otherwise return 0.
-gdb_caching_proc supports_gnuc {
-    set me "supports_gnuc"
-    set src {
-       #ifndef __GNUC__
-       #error "No gnuc"
-       #endif
-    }
-    return [gdb_simple_compile $me $src object ""]
-}
-
 # Return 1 if target supports mpx, otherwise return 0.
 gdb_caching_proc have_mpx {
     global srcdir