m68k: mac: Remove unused sine_data[]

When building with W=1:

    arch/m68k/mac/macboing.c:29:26: warning: ‘sine_data’ defined but not used [-Wunused-const-variable=]
       29 | static const signed char sine_data[] = {
	  |                          ^~~~~~~~~

The predefined sine table was superseded by a table calculated at
run-time in v2.2.0.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/75dbc0a141490daf9febfb8cb4a43ae87fbe3352.1694613528.git.geert@linux-m68k.org

arch/m68k/mac/macboing.c

@@ -22,15 +22,6 @@ static int mac_asc_inited;
  */
 static __u8 mac_asc_wave_tab[ 0x800 ];
 
-/*
- * Alan's original sine table; needs interpolating to 0x800
- * (hint: interpolate or hardwire [0 -> Pi/2[, it's symmetric)
- */
-static const signed char sine_data[] = {
-	0,  39,  75,  103,  121,  127,  121,  103,  75,  39,
-	0, -39, -75, -103, -121, -127, -121, -103, -75, -39
-};
-
 /*
  * where the ASC hides ...
  */