remove unused hires variable from drawcolumndata

src/r_defs.h

@@ -1093,7 +1093,6 @@ typedef struct
 	INT32 yh;
 	fixed_t iscale;
 	fixed_t texturemid;
-	UINT8 hires;
 	UINT8 shadowcolor;
 
 	UINT8* source; // first pixel in a column

src/r_draw_column.cpp

@@ -250,7 +250,7 @@ static void R_DrawColumnTemplate(drawcolumndata_t *dc)
 		// Determine scaling, which is the only mapping to be done.
 		fracstep = dc->iscale;
 		//frac = dc_texturemid + (dc_yl - centery)*fracstep;
-		frac = (dc->texturemid + FixedMul((dc->yl << FRACBITS) - centeryfrac, fracstep)) * (!dc->hires);
+		frac = dc->texturemid + FixedMul((dc->yl << FRACBITS) - centeryfrac, fracstep);
 
 		// Inner loop that does the actual texture mapping, e.g. a DDA-like scaling.
 		// This is as fast as it gets.

src/r_things.cpp

@@ -1141,7 +1141,6 @@ static void R_DrawVisSprite(vissprite_t *vis)
 	}
 
 	R_SetColumnFunc(BASEDRAWFUNC, false);
-	dc.hires = 0;
 
 	vis->x1 = x1;
 	vis->x2 = x2;