Remove duplicate test.

tests/short-circuit-13.ispc

@@ -1,25 +0,0 @@
-
-export uniform int width() { return programCount; }
-
-uniform int * uniform ptr;
-
-float foo(uniform float a[]) {
-    int index = (programIndex & 1) * 10000;
-    if (a[programIndex] < 10000 && a[index] == 1)
-        return 1;
-    else
-        return 1234;
-}
-
-export void f_fu(uniform float RET[], uniform float aFOO[], uniform float b) {
-    float a = aFOO[programIndex]; 
-    float a0 = aFOO[0], a1 = aFOO[1];
-    if ((programIndex & 1) == 0)
-        RET[programIndex] = foo(aFOO);
-    else
-        RET[programIndex] = 2;
-}
-
-export void result(uniform float RET[]) {
-    RET[programIndex] = (programIndex & 1) ? 2 : 1;
-}