linkage_checker: use default use_cache parameter for callers.

Library/Homebrew/extend/os/mac/formula_cellar_checks.rb

@@ -67,9 +67,7 @@ module FormulaCellarChecks
     keg = Keg.new(formula.prefix)
 
     CacheStoreDatabase.use(:linkage) do |db|
-      checker = LinkageChecker.new(
-        keg, formula, cache_db: db, use_cache: !ENV["HOMEBREW_LINKAGE_CACHE"].nil?
-      )
+      checker = LinkageChecker.new(keg, formula, cache_db: db)
       next unless checker.broken_library_linkage?
 
       output = <<~EOS

Library/Homebrew/formula.rb

@@ -1537,9 +1537,7 @@ class Formula
     return [] unless keg
 
     undeclared_deps = CacheStoreDatabase.use(:linkage) do |db|
-      linkage_checker = LinkageChecker.new(
-        keg, self, cache_db: db, use_cache: !ENV["HOMEBREW_LINKAGE_CACHE"].nil?
-      )
+      linkage_checker = LinkageChecker.new(keg, self, cache_db: db)
       linkage_checker.undeclared_deps.map { |n| Dependency.new(n) }
     end