remove unused fOverflowed from SkClampRange

src/effects/gradients/SkClampRange.cpp

Index: src/effects/gradients/SkClampRange.cpp
diff --git a/src/effects/gradients/SkClampRange.cpp b/src/effects/gradients/SkClampRange.cpp
index 3e2ca8e9320168f4da759d4b7758a09917f90f64..398b02434fd531ac137d69abd8ab18aa84273c0a 100644
--- a/src/effects/gradients/SkClampRange.cpp
+++ b/src/effects/gradients/SkClampRange.cpp
@@ -50,7 +50,6 @@ void SkClampRange::init(SkFixed fx0, SkFixed dx0, int count, int v0, int v1) {
 
     fV0 = v0;
     fV1 = v1;
-    fOverflowed = false;
 
     // special case 1 == count, as it is slightly common for skia
     // and avoids us ever calling divide or 64bit multiply
@@ -63,7 +62,6 @@ void SkClampRange::init(SkFixed fx0, SkFixed dx0, int count, int v0, int v1) {
     int64_t dx = dx0;
     // start with ex equal to the last computed value
     int64_t ex = fx + (count - 1) * dx;
-    fOverflowed = overflows_fixed(ex);
 
     if ((uint64_t)(fx | ex) <= 0xFFFF) {
         fCount0 = fCount2 = 0;
@@ -86,9 +84,8 @@ void SkClampRange::init(SkFixed fx0, SkFixed dx0, int count, int v0, int v1) {
 
     // now make ex be 1 past the last computed value
     ex += dx;
-    fOverflowed = overflows_fixed(ex);
     // now check for over/under flow
-    if (fOverflowed) {
+    if (overflows_fixed(ex)) {
         int originalCount = count;
         int64_t ccount;
         bool swap = dx < 0;