Fixup CI for new features

Signed-off-by: Nico Burns <nico@nicoburns.com>

Author: nicoburns

.github/workflows/main.yml

@@ -20,14 +20,12 @@ jobs:
           - stable
           - 1.68.0
         features:
+          - --no-default-features
           -
-          - --features dummy_match_byte
           - --features malloc_size_of
         include:
           - toolchain: nightly
             features: --features bench
-          - toolchain: nightly
-            features: --features bench,dummy_match_byte
     steps:
       - uses: actions/checkout@v2