Remove the duplicate code in mbedtls/include/mbedtls/check_config.h

Removing the extra preprocessor directives found within the specified
source file.

Signed-off-by: Spencer Burke <info.spencer.burke@gmail.com>
diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index 85f7efd..9b91f32 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -461,10 +461,6 @@
 #error "MBEDTLS_PLATFORM_STD_CALLOC defined, but not all prerequisites"
 #endif
 
-#if defined(MBEDTLS_PLATFORM_STD_CALLOC) && !defined(MBEDTLS_PLATFORM_MEMORY)
-#error "MBEDTLS_PLATFORM_STD_CALLOC defined, but not all prerequisites"
-#endif
-
 #if defined(MBEDTLS_PLATFORM_STD_FREE) && !defined(MBEDTLS_PLATFORM_MEMORY)
 #error "MBEDTLS_PLATFORM_STD_FREE defined, but not all prerequisites"
 #endif