programs/fuzz: Remove superfluous MBEDTLS_HAVE_TIME

MBEDTLS_HAVE_TIME_ALT implies MBEDTLS_HAVE_TIME, so an extra
check for MBEDTLS_HAVE_TIME is not needed.

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/programs/fuzz/common.c b/programs/fuzz/common.c
index 15ddf07..269c2e3 100644
--- a/programs/fuzz/common.c
+++ b/programs/fuzz/common.c
@@ -15,7 +15,7 @@
 
 void dummy_init()
 {
-#if (defined(MBEDTLS_HAVE_TIME) && defined(MBEDTLS_PLATFORM_TIME_ALT))
+#if defined(MBEDTLS_PLATFORM_TIME_ALT)
     mbedtls_platform_set_time( dummy_constant_time );
 #else
     fprintf(stderr, "Warning: fuzzing without constant time\n");