GH-1856 Make MultiMC fail hard when things are missing

Things like:
* jar mods
* valid version files

api/logic/minecraft/onesix/OneSixInstance.cpp

@@ -23,7 +23,6 @@
 #include "OneSixProfileStrategy.h"
 
 #include "minecraft/MinecraftProfile.h"
-#include "minecraft/VersionBuildError.h"
 #include "minecraft/launch/ModMinecraftJar.h"
 #include "MMCZip.h"
 

api/logic/minecraft/onesix/OneSixProfileStrategy.cpp

@@ -2,7 +2,6 @@
 #include "OneSixInstance.h"
 #include "OneSixVersionFormat.h"
 
-#include "minecraft/VersionBuildError.h"
 #include "Env.h"
 #include <FileSystem.h>
 
@@ -107,10 +106,6 @@ void OneSixProfileStrategy::loadDefaultBuiltinPatches()
 			profilePatch = std::make_shared<ProfilePatch>(metaVersion);
 			profilePatch->setVanilla(true);
 		}
-		if (!profilePatch)
-		{
-			throw VersionIncomplete(uid);
-		}
 		profilePatch->setOrder(order);
 		profile->appendPatch(profilePatch);
 	};
@@ -291,6 +286,7 @@ bool OneSixProfileStrategy::customizePatch(ProfilePatchPtr patch)
 	{
 		return false;
 	}
+	// FIXME: get rid of this try-catch.
 	try
 	{
 		QSaveFile jsonFile(filename);
@@ -311,10 +307,6 @@ bool OneSixProfileStrategy::customizePatch(ProfilePatchPtr patch)
 		}
 		load();
 	}
-	catch (VersionIncomplete &error)
-	{
-		qDebug() << "Version was incomplete:" << error.cause();
-	}
 	catch (Exception &error)
 	{
 		qWarning() << "Version could not be loaded:" << error.cause();
@@ -337,14 +329,11 @@ bool OneSixProfileStrategy::revertPatch(ProfilePatchPtr patch)
 	}
 	// just kill the file and reload
 	bool result = QFile::remove(filename);
+	// FIXME: get rid of this try-catch.
 	try
 	{
 		load();
 	}
-	catch (VersionIncomplete &error)
-	{
-		qDebug() << "Version was incomplete:" << error.cause();
-	}
 	catch (Exception &error)
 	{
 		qWarning() << "Version could not be loaded:" << error.cause();

api/logic/minecraft/onesix/OneSixVersionFormat.cpp

@@ -1,7 +1,6 @@
 #include "OneSixVersionFormat.h"
 #include <Json.h>
 #include "minecraft/ParseUtils.h"
-#include <minecraft/VersionBuildError.h>
 #include <minecraft/MojangVersionFormat.h>
 
 using namespace Json;