libutil: remove Pool::flushBad

this was never actually used, and bad design in the first place—why
should a bad resource be put back into the idle pool? just drop it.

Change-Id: Idab8774bee19dadae0209d404c4fb86dd4aeba1e

4 files changed, 0 insertions, 32 deletions

diff --git a/src/libstore/remote-store.cc b/src/libstore/remote-store.cc
index f0dbe8e21..20c1c50f2 100644
--- a/src/libstore/remote-store.cc
+++ b/src/libstore/remote-store.cc
@@ -940,11 +940,6 @@ std::optional<TrustedFlag> RemoteStore::isTrustedClient()
     return conn->remoteTrustsUs;
 }
 
-void RemoteStore::flushBadConnections()
-{
-    connections->flushBad();
-}
-
 
 RemoteStore::Connection::~Connection()
 {
diff --git a/src/libstore/remote-store.hh b/src/libstore/remote-store.hh
index f0985fdc1..0cae81e16 100644
--- a/src/libstore/remote-store.hh
+++ b/src/libstore/remote-store.hh
@@ -161,8 +161,6 @@ public:
 
     std::optional<TrustedFlag> isTrustedClient() override;
 
-    void flushBadConnections();
-
     struct Connection;
 
     ref<Connection> openConnectionWrapper();
diff --git a/src/libutil/pool.hh b/src/libutil/pool.hh
index 548e7ce69..b7a749e3a 100644
--- a/src/libutil/pool.hh
+++ b/src/libutil/pool.hh
@@ -184,16 +184,6 @@ public:
     {
         return state.lock()->max;
     }
-
-    void flushBad()
-    {
-        auto state_(state.lock());
-        std::vector<ref<R>> left;
-        for (auto & p : state_->idle)
-            if (validator(p))
-                left.push_back(p);
-        std::swap(state_->idle, left);
-    }
 };
 
 }
diff --git a/tests/unit/libutil/pool.cc b/tests/unit/libutil/pool.cc
index a3743e601..3ad4ed3aa 100644
--- a/tests/unit/libutil/pool.cc
+++ b/tests/unit/libutil/pool.cc
@@ -65,21 +65,6 @@ namespace nix {
         ASSERT_EQ(pool.capacity(), 0);
     }
 
-    TEST(Pool, flushBadDropsOutOfScopeResources) {
-        auto isGood = [](const ref<TestResource> & r) { return false; };
-        auto createResource = []() { return make_ref<TestResource>(); };
-
-        Pool<TestResource> pool = Pool<TestResource>((size_t)1, createResource, isGood);
-
-        {
-            auto _r = pool.get();
-            ASSERT_EQ(pool.count(), 1);
-        }
-
-        pool.flushBad();
-        ASSERT_EQ(pool.count(), 0);
-    }
-
     // Test that the resources we allocate are being reused when they are still good.
     TEST(Pool, reuseResource) {
         auto isGood = [](const ref<TestResource> & r) { return true; };