Apply fixes for IsParting() pull request.

src/IRCSock.cpp

@@ -1204,7 +1204,6 @@ bool CIRCSock::OnPartMessage(CPartMessage& Message) {
     }
 
     if (Nick.NickEquals(GetNick())) {
-        if (pChan) pChan->SetParting(false);
         m_pNetwork->DelChan(sChan);
     }
 

test/IRCSockTest.cpp

@@ -574,9 +574,6 @@ TEST_F(IRCSockTest, PartingFlag) {
     CMessage serverPart(":me PART #chan");
     m_pTestSock->ReadLine(serverPart.ToString());
 
-    // IsParting() should be free
-    EXPECT_FALSE(m_pTestChan->IsParting());
-
     // Verify channel was deleted
     EXPECT_EQ(m_pTestNetwork->FindChan("#chan"), nullptr);
 }
@@ -593,7 +590,7 @@ TEST_F(IRCSockTest, PartingFlagOnError) {
     CMessage errorMsg(":server 442 me #chan :You're not on that channel");
     m_pTestSock->ReadLine(errorMsg.ToString());
 
-    // IsParting() should be free
+    // IsParting() should be cleared
     EXPECT_FALSE(m_pTestChan->IsParting());
 
     // Verify channel was deleted

test/integration/tests/core.cpp

@@ -1368,9 +1368,7 @@ TEST_F(ZNCTest, PartWithError403) {
     client.ReadUntil(":nick JOIN :#test");
     client.Write("PART #test");
 
-    QByteArray partMsg;
-    ircd.ReadUntilAndGet("PART", partMsg);
-    EXPECT_THAT(partMsg.toStdString(), HasSubstr("PART #test"));
+    ircd.ReadUntil("PART #test");
 
     // Server returns 403 error (ERR_NOSUCHCHANNEL) instead of confirming
     ircd.Write(":server 403 nick #test :No such channel");