Update audio.h

Remove header, change multiline comment into single line comment

Source/Android/PluginRSP/audio.h

@@ -1,8 +1,3 @@
-// Project64 - A Nintendo 64 emulator
-// http://www.pj64-emu.com/
-// Copyright(C) 2001-2021 Project64
-// Copyright(C) 2014 Bobby Smiles
-// GNU/GPLv2 licensed: https://gnu.org/licenses/gpl-2.0.html
 #pragma once
 
 extern const int16_t RESAMPLE_LUT[64 * 4];
@@ -13,7 +8,7 @@ static inline int16_t adpcm_predict_sample(uint8_t byte, uint8_t mask,
     unsigned lshift, unsigned rshift)
 {
     int16_t sample = (uint16_t)(byte & mask) << lshift;
-    sample >>= rshift; /* signed */
+    sample >>= rshift; // signed
     return sample;
 }