Fix mistake on astc conversion, make some static methods that shouldn't be public private, remove old commmented out code

Ryujinx.Graphics/Gal/Shader/ShaderDecodeAlu.cs

@@ -620,7 +620,7 @@ namespace Ryujinx.Graphics.Gal.Shader
             }
         }
 
-        public static void EmitRro(ShaderIrBlock Block, long OpCode, ShaderOper Oper)
+        private static void EmitRro(ShaderIrBlock Block, long OpCode, ShaderOper Oper)
         {
             //Note: this is a range reduction instruction and is supposed to
             //be used with Mufu, here it just moves the value and ignores the operation.

Ryujinx.Graphics/Gal/Shader/ShaderDecodeMem.cs

@@ -216,11 +216,6 @@ namespace Ryujinx.Graphics.Gal.Shader
                 }
 
                 Block.AddNode(GetPredNode(new ShaderIrAsg(Dst, Src), OpCode));
-
-                /*if (IsScalar)
-                {
-                    break;
-                }*/
             }
         }