make lix dev shells un-bear-able since we un-make them now

We don't need bear anymore, since we don't have any more bad build
systems that lack compile commands generation inside Lix.

Change-Id: I7809ddfd993180468f846e8cd862bdd54d5b31ec

package.nix

@@ -375,7 +375,6 @@ stdenv.mkDerivation (finalAttrs: {
         just,
         nixfmt,
         glibcLocales,
-        bear,
         pre-commit-checks,
         clang-tools,
         llvmPackages,
@@ -418,7 +417,6 @@ stdenv.mkDerivation (finalAttrs: {
               llvmPackages.clang-unwrapped.dev
             ]
             ++ lib.optional (pre-commit-checks ? enabledPackages) pre-commit-checks.enabledPackages
-            ++ lib.optional (stdenv.cc.isClang && !stdenv.buildPlatform.isDarwin) bear
             ++ lib.optional (lib.meta.availableOn stdenv.buildPlatform clangbuildanalyzer) clangbuildanalyzer
             ++ finalAttrs.checkInputs;