swrast: remove some unneeded CHAN_TYPE!=GL_FLOAT code

src/mesa/swrast/s_texcombine.c

@@ -408,17 +408,10 @@ texture_combine( GLcontext *ctx, GLuint unit, GLuint n,
          /* this produces a fixed rgba color, and the coord calc is done elsewhere */
          for (i = 0; i < n; i++) {
             /* rgba result is 0,0,0,1 */
-#if CHAN_TYPE == GL_FLOAT
             rgba[i][RCOMP] = 0.0;
             rgba[i][GCOMP] = 0.0;
             rgba[i][BCOMP] = 0.0;
             rgba[i][ACOMP] = 1.0;
-#else
-            rgba[i][RCOMP] = 0;
-            rgba[i][GCOMP] = 0;
-            rgba[i][BCOMP] = 0;
-            rgba[i][ACOMP] = CHAN_MAX;
-#endif
 	 }
          return; /* no alpha processing */
       default: