Revert "Fix eclipse warnings"

This reverts commit 3175942514.

Reason for revert: this change leads to breakages inside google. We are still on BC 1.5.5

gerrit-gpg/test/java/com/google/gerrit/gpg/testutil/TestKey.java:80: error: incompatible types: Object cannot be converted to String
    return getPublicKey().getUserIDs().next();
                                           ^

Change-Id: Idc603ad379f1265da8b851afed3fdea6598bf27c

gerrit-gpg/src/main/java/com/google/gerrit/gpg/GerritPublicKeyChecker.java

@@ -176,6 +176,7 @@ public class GerritPublicKeyChecker extends PublicKeyChecker {
 
   private boolean hasAllowedUserId(PGPPublicKey key, Set<String> allowedUserIds)
       throws PGPException {
+    @SuppressWarnings("unchecked")
     Iterator<String> userIds = key.getUserIDs();
     while (userIds.hasNext()) {
       String userId = userIds.next();

gerrit-gpg/src/main/java/com/google/gerrit/gpg/PublicKeyChecker.java

@@ -381,6 +381,7 @@ public class PublicKeyChecker {
     }
 
     List<CheckResult> signerResults = new ArrayList<>();
+    @SuppressWarnings("unchecked")
     Iterator<String> userIds = key.getUserIDs();
     while (userIds.hasNext()) {
       String userId = userIds.next();

gerrit-gpg/src/main/java/com/google/gerrit/gpg/PublicKeyStore.java

@@ -398,6 +398,7 @@ public class PublicKeyStore implements AutoCloseable {
   }
 
   public static String keyToString(PGPPublicKey key) {
+    @SuppressWarnings("unchecked")
     Iterator<String> it = key.getUserIDs();
     return String.format(
         "%s %s(%s)",

gerrit-gpg/src/main/java/com/google/gerrit/gpg/server/GpgKeys.java

@@ -219,6 +219,7 @@ public class GpgKeys implements ChildCollection<AccountResource, GpgKey> {
     if (key != null) {
       info.id = PublicKeyStore.keyIdToString(key.getKeyID());
       info.fingerprint = Fingerprint.toString(key.getFingerprint());
+      @SuppressWarnings("unchecked")
       Iterator<String> userIds = key.getUserIDs();
       info.userIds = ImmutableList.copyOf(userIds);
 

gerrit-gpg/src/test/java/com/google/gerrit/gpg/GerritPublicKeyCheckerTest.java

@@ -374,7 +374,7 @@ public class GerritPublicKeyCheckerTest {
 
     PGPPublicKeyRing keyRingB = keyB().getPublicKeyRing();
     PGPPublicKey keyB = keyRingB.getPublicKey();
-    keyB = PGPPublicKey.removeCertification(keyB, keyB.getUserIDs().next());
+    keyB = PGPPublicKey.removeCertification(keyB, (String) keyB.getUserIDs().next());
     keyRingB = PGPPublicKeyRing.insertPublicKey(keyRingB, keyB);
     add(keyRingB, addUser("userB"));
 
@@ -392,7 +392,8 @@ public class GerritPublicKeyCheckerTest {
     List<ExternalId> newExtIds = new ArrayList<>(2);
     newExtIds.add(ExternalId.create(toExtIdKey(kr.getPublicKey()), id));
 
-    String userId = Iterators.getOnlyElement(kr.getPublicKey().getUserIDs(), null);
+    @SuppressWarnings("unchecked")
+    String userId = (String) Iterators.getOnlyElement(kr.getPublicKey().getUserIDs(), null);
     if (userId != null) {
       String email = PushCertificateIdent.parse(userId).getEmailAddress();
       assertThat(email).contains("@");

gerrit-gpg/src/test/java/com/google/gerrit/gpg/PublicKeyStoreTest.java

@@ -231,6 +231,7 @@ public class PublicKeyStoreTest {
 
   private void assertUserIds(PGPPublicKeyRing keyRing, String... expected) throws Exception {
     List<String> actual = new ArrayList<>();
+    @SuppressWarnings("unchecked")
     Iterator<String> userIds =
         store.get(keyRing.getPublicKey().getKeyID()).iterator().next().getPublicKey().getUserIDs();
     while (userIds.hasNext()) {

gerrit-gpg/src/test/java/com/google/gerrit/gpg/testutil/TestKey.java

@@ -77,7 +77,7 @@ public class TestKey {
   }
 
   public String getFirstUserId() {
-    return getPublicKey().getUserIDs().next();
+    return (String) getPublicKey().getUserIDs().next();
   }
 
   public PGPPrivateKey getPrivateKey() throws PGPException {