Remove FMT dependency (#1472)

All occurrences of log() have been replaced with qDebug()

bonus meme: remove a bunch of std::string usages in the pubsub client

Fixes #1467

src/widgets/dialogs/LoginDialog.cpp

@@ -65,7 +65,7 @@ namespace {
         //    messageBox.setIcon(QMessageBox::Information);
         //    messageBox.setText("Successfully logged in with user <b>" +
         //    qS(username) + "</b>!");
-        auto basePath = fS("/accounts/uid{}", userID);
+        std::string basePath = "/accounts/uid" + userID.toStdString();
         pajlada::Settings::Setting<QString>::set(basePath + "/username",
                                                  username);
         pajlada::Settings::Setting<QString>::set(basePath + "/userID", userID);

src/widgets/dialogs/LogsPopup.cpp

@@ -3,7 +3,6 @@
 #include "IrcMessage"
 #include "common/Channel.hpp"
 #include "common/NetworkRequest.hpp"
-#include "debug/Log.hpp"
 #include "messages/Message.hpp"
 #include "providers/twitch/PartialTwitchUser.hpp"
 #include "providers/twitch/TwitchChannel.hpp"
@@ -70,7 +69,7 @@ void LogsPopup::getLogs()
         return;
     }
 
-    log("Unable to get logs, no channel name or something specified");
+    qDebug() << "Unable to get logs, no channel name or something specified";
 }
 
 void LogsPopup::setMessages(std::vector<MessagePtr> &messages)

src/widgets/dialogs/QualityPopup.cpp

@@ -1,5 +1,4 @@
 #include "QualityPopup.hpp"
-#include "debug/Log.hpp"
 #include "util/StreamLink.hpp"
 
 namespace chatterino {
@@ -50,7 +49,7 @@ void QualityPopup::okButtonClicked()
     }
     catch (const Exception &ex)
     {
-        log("Exception caught trying to open streamlink: {}", ex.what());
+        qDebug() << "Exception caught trying to open streamlink:" << ex.what();
     }
 
     this->close();