Cleanup: Fix compiler warning from previous commit

The use_deform argument was always passed as zero or one, so the "< 0"
check is no longer necessary.

source/blender/blenkernel/intern/DerivedMesh.cc

@@ -1173,7 +1173,7 @@ static void mesh_calc_modifiers(struct Depsgraph *depsgraph,
       continue;
     }
 
-    if (use_deform < 0 && mti->dependsOnTime && mti->dependsOnTime(md)) {
+    if (mti->dependsOnTime && mti->dependsOnTime(md)) {
       continue;
     }