Make Pay mode work like Free

Third time's a charm.  Removing Pay mode without causing breakage to the Lua API.
This is the first step.

src/GameState.cpp

@@ -361,13 +361,7 @@ void GameState::Reset()
 
 void GameState::JoinPlayer( PlayerNumber pn )
 {
-	/* If joint premium and we're not taking away a credit for the 2nd join,
-	 * give the new player the same number of stage tokens that the old player
-	 * has. */
-	if( GetCoinMode() == CoinMode_Pay && GetPremium() == Premium_2PlayersFor1Credit && GetNumSidesJoined() == 1 )
-		m_iPlayerStageTokens[pn] = m_iPlayerStageTokens[this->GetMasterPlayerNumber()];
-	else
-		m_iPlayerStageTokens[pn] = PREFSMAN->m_iSongsPerPlay;
+	m_iPlayerStageTokens[pn] = PREFSMAN->m_iSongsPerPlay;
 
 	m_bSideIsJoined[pn] = true;
 
@@ -489,17 +483,7 @@ bool GameState::JoinPlayers()
 
 int GameState::GetCoinsNeededToJoin() const
 {
-	int iCoinsToCharge = 0;
-
-	if( GetCoinMode() == CoinMode_Pay )
-		iCoinsToCharge = PREFSMAN->m_iCoinsPerCredit;
-
-	// If joint premium, don't take away a credit for the second join.
-	if( GetPremium() == Premium_2PlayersFor1Credit  &&
-		GetNumSidesJoined() == 1 )
-		iCoinsToCharge = 0;
-
-	return iCoinsToCharge;
+	return 0;
 }
 
 /* Game flow:
@@ -2055,10 +2039,9 @@ bool GameState::IsEventMode() const
 
 CoinMode GameState::GetCoinMode() const
 {
-	if( IsEventMode() && GamePreferences::m_CoinMode == CoinMode_Pay )
-		return CoinMode_Free;
-	else
-		return GamePreferences::m_CoinMode;
+	if( GamePreferences::m_CoinMode == CoinMode_Home )
+		return CoinMode_Home;
+	return CoinMode_Free;
 }
 
 ThemeMetric<bool> DISABLE_PREMIUM_IN_EVENT_MODE("GameState","DisablePremiumInEventMode");