Tests: disable the C90 test

thiagomacieira · thiagomacieira · commit 4df5e4f70045 · 2024-05-01T18:29:45.000-07:00
We don't support this any more.
```
../../src/cbor.h:255:69: error: '_Bool' is a C99 extension [-Werror,-Wc99-extensions]
CBOR_INLINE_API CborError cbor_encode_boolean(CborEncoder *encoder, bool value)
                                                                    ^
```

Signed-off-by: Thiago Macieira &lt;thiago.macieira@intel.com&gt;
diff --git a/tests/tests.pro b/tests/tests.pro
@@ -1,3 +1,3 @@
 TEMPLATE = subdirs
-SUBDIRS = parser encoder c90 cpp tojson
+SUBDIRS = parser encoder cpp tojson
 msvc: SUBDIRS -= tojson
