Remove unused files

docs/CHANGELOG.md

@@ -1,3 +0,0 @@
-## v1.0
-
-- Initial release.

docs/README.md

@@ -1,3 +0,0 @@
-# Flipper Zero - Development Toolkit
-
-Short description.

sound/sound.h

@@ -1,28 +0,0 @@
-#pragma once
-
-#include <stdint.h>
-#include <stdbool.h>
-
-typedef enum {
-    SoundGeneratorModePlay,
-    SoundGeneratorModeStop,
-} SoundGeneratorMode;
-
-typedef enum {
-    SoundGeneratorSoundBeep,
-    SoundGeneratorSoundTone,
-    SoundGeneratorSoundNoise,
-} SoundGeneratorSound;
-
-typedef struct SoundGenerator SoundGenerator;
-
-SoundGenerator* sound_generator_alloc();
-void sound_generator_free(SoundGenerator* sound_generator);
-
-void sound_generator_set_mode(SoundGenerator* sound_generator, SoundGeneratorMode mode);
-void sound_generator_start(SoundGenerator* sound_generator);
-void sound_generator_stop(SoundGenerator* sound_generator);
-
-void sound_generator_set_sound(SoundGenerator* sound_generator, SoundGeneratorSound sound);
-void sound_generator_set_frequency(SoundGenerator* sound_generator, uint16_t frequency);
-void sound_generator_set_volume(SoundGenerator* sound_generator, uint8_t volume);