made bone death sound louder and removed unused sounds

audio/sounds/die_skeleton.wav.import

@@ -0,0 +1,23 @@
+[remap]
+
+importer="wav"
+type="AudioStreamSample"
+path="res://.import/die_skeleton.wav-5ebafbb57bab56e76a09d94d4eb83665.sample"
+
+[deps]
+
+source_file="res://audio/sounds/die_skeleton.wav"
+dest_files=[ "res://.import/die_skeleton.wav-5ebafbb57bab56e76a09d94d4eb83665.sample" ]
+
+[params]
+
+force/8_bit=false
+force/mono=false
+force/max_rate=false
+force/max_rate_hz=44100
+edit/trim=false
+edit/normalize=false
+edit/loop_mode=0
+edit/loop_begin=0
+edit/loop_end=-1
+compress/mode=0