C64: remove OSD and Scandoubler definitions from top-level

They're in the video_mixer

cores/c64/rtl/c64_mist.vhd

@@ -222,59 +222,6 @@ component video_mixer
 	);
 end component video_mixer;
 
----------
--- OSD
----------
-
-component osd generic ( OSD_COLOR : std_logic_vector(2 downto 0)); port
-(
-	clk_sys   : in std_logic;
-	ce_pix    : in std_logic;
-
-	SPI_SCK   : in std_logic;
-	SPI_SS3   : in std_logic;
-	SPI_DI    : in std_logic;
-		
-	-- VGA signals coming from core
-	VGA_Rx    : in std_logic_vector(5 downto 0);
-	VGA_Gx    : in std_logic_vector(5 downto 0);
-	VGA_Bx    : in std_logic_vector(5 downto 0);
-	OSD_HS    : in std_logic;
-	OSD_VS    : in std_logic;
-
-	-- VGA signals going to video connector
-	VGA_R     : out std_logic_vector(5 downto 0);
-	VGA_G     : out std_logic_vector(5 downto 0);
-	VGA_B     : out std_logic_vector(5 downto 0)
-);
-end component osd;
-
----------
--- Scan doubler
----------
-component scandoubler is port
-(
-	clk_sys   : in std_logic;
-	ce_x2     : in std_logic;
-	ce_x1     : in std_logic;
-	scanlines : in std_logic_vector(1 downto 0);
-
-	-- c64 input
-	r_in      : in std_logic_vector(5 downto 0);
-	g_in      : in std_logic_vector(5 downto 0);
-	b_in      : in std_logic_vector(5 downto 0);
-	hs_in     : in std_logic;
-	vs_in     : in std_logic;
-		
-	-- vga output
-	r_out     : out std_logic_vector(5 downto 0);
-	g_out     : out std_logic_vector(5 downto 0);
-	b_out     : out std_logic_vector(5 downto 0);
-	hs_out    : out std_logic;
-	vs_out    : out std_logic
-);
-end component;
-	
 ---------
 -- audio
 --------