diff --git a/src/org/fdroid/fdroid/FDroidCertPins.java b/src/org/fdroid/fdroid/FDroidCertPins.java
index ee5192602..d91563edb 100644
--- a/src/org/fdroid/fdroid/FDroidCertPins.java
+++ b/src/org/fdroid/fdroid/FDroidCertPins.java
@@ -28,9 +28,6 @@ public class FDroidCertPins {
             // Fingerprint: 84B91CDF2312CB9BA7F3BE803783302F8D8C299F
             "638F93856E1F5EDFCBD40C46D4160CFF21B0713A",
 
-            // OU=PositiveSSL, CN=f-droid.org
-            "83a288fdbf7fb27ca2268d553168eb8f38298910",
-
             // OU=Gandi Standard SSL, CN=guardianproject.info
             "cf2f8e226027599a1a933701418c58ec688a8305",
 
diff --git a/src/org/fdroid/fdroid/views/fragments/PreferenceFragment.java b/src/org/fdroid/fdroid/views/fragments/PreferenceFragment.java
index 3595a70b6..b029f437a 100644
--- a/src/org/fdroid/fdroid/views/fragments/PreferenceFragment.java
+++ b/src/org/fdroid/fdroid/views/fragments/PreferenceFragment.java
@@ -140,16 +140,6 @@ public class PreferenceFragment
         } else if (key.equals(Preferences.PREF_EXPERT)) {
             onoffSummary(key, R.string.expert_on,
                 R.string.expert_off);
-            CheckBoxPreference pref = (CheckBoxPreference) findPreference(key);
-            Preference rinst = findPreference(Preferences.PREF_ROOT_INSTALLER);
-            Preference sinst = findPreference(Preferences.PREF_SYSTEM_INSTALLER);
-            if (pref.isChecked()) {
-                rinst.setEnabled(true);
-                sinst.setEnabled(true);
-            } else {
-                rinst.setEnabled(false);
-                sinst.setEnabled(false);
-            }
 
         } else if (key.equals(Preferences.PREF_ROOT_INSTALLER)) {
             onoffSummary(key, R.string.root_installer_on,