tests: remove cavs*.tplg when testing v2.2.1 topology tar ball

cavs*.tplg are topology v2 files that are not used by any Intel
released platforms atm. They should not be included in v2.2.x
releases.

Signed-off-by: mengdonglin <mengdong.lin@intel.com>

tests/tests.bats

@@ -50,7 +50,7 @@ teardown()
     test_init
     get_release "$ver"/sof-tplg-"$ver".tar.gz
     # These should have never been there
-    # rm "$EXTR_REFS"/sof-tplg-v2.2.1/cavs-*.tplg
+    rm "$EXTR_REFS"/sof-tplg-v2.2.1/cavs-*.tplg
     test_tarball_topologies_only v2.2.x "$ver"
 }