Remove redundant Checking in AC_MSG_CHECKING calls.

Signed-off-by: Garrett Cooper <yanegomi@gmail.com>
diff --git a/testcases/realtime/configure.in b/testcases/realtime/configure.in
index 87e699b..f833f00 100644
--- a/testcases/realtime/configure.in
+++ b/testcases/realtime/configure.in
@@ -20,7 +20,7 @@
 AC_PROG_AR
 AC_PROG_RANLIB
 
-AC_MSG_CHECKING([Checking for __sync_add_and_fetch gcc builtin function])
+AC_MSG_CHECKING([for __sync_add_and_fetch gcc builtin function])
 AC_LINK_IFELSE([
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE
@@ -41,7 +41,7 @@
 
 if test "x$has_priority_inherit" = xyes; then
 
-	AC_MSG_CHECKING([Checking for pthread mutex attr protocol functions])
+	AC_MSG_CHECKING([for pthread mutex attr protocol functions])
 	AC_TRY_COMPILE([
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE