Drop rlib from build_cairo_plugin tests (#1493)

commit-id:fe940136

---

**Stack**:
- #1497
- #1496
- #1495
- #1494
- #1493 ⬅


⚠️ *Part of a stack created by [spr](https://github.com/ejoffe/spr). Do
not merge manually using the UI - doing so may have unexpected results.*

Author: maciektr

scarb/tests/build_cairo_plugin.rs

@@ -76,7 +76,7 @@ impl CairoPluginProjectBuilder {
                 publish = false
 
                 [lib]
-                crate-type = ["rlib","cdylib"]
+                crate-type = ["cdylib"]
 
                 [dependencies]
                 cairo-lang-macro = {{ path = {macro_lib_path}}}