commands/exec: don't use recursive deps.

This (somewhat) makes sense when building formulae but doesn't make
sense for `brew bundle exec`. The list should be fairly minimal and
reflect actual project dependencies from the `Brewfile` rather than
all recursive ones.

Author: MikeMcQuaid

lib/bundle/commands/exec.rb

@@ -33,9 +33,8 @@ def run(*args, global: false, file: nil)
         ENV.deps = @dsl.entries.map do |entry|
           next if entry.type != :brew
 
-          f = Formulary.factory(entry.name)
-          [f, f.recursive_dependencies.map(&:to_formula)]
-        end.flatten.compact
+          Formulary.factory(entry.name)
+        end.compact
         ENV.keg_only_deps = ENV.deps.select(&:keg_only?)
         ENV.setup_build_environment