Removed dead ceiling function.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/88133002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18079 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/platform-posix.cc

@@ -288,12 +288,6 @@ void OS::DebugBreak() {
 // ----------------------------------------------------------------------------
 // Math functions
 
-double ceiling(double x) {
-  // Correct buggy 'ceil' on some systems (i.e. FreeBSD, OS X 10.5)
-  return (-1.0 < x && x < 0.0) ? -0.0 : ceil(x);
-}
-
-
 double modulo(double x, double y) {
   return fmod(x, y);
 }

src/platform-win32.cc

@@ -133,11 +133,6 @@ intptr_t OS::MaxVirtualMemory() {
 }
 
 
-double ceiling(double x) {
-  return ceil(x);
-}
-
-
 #if V8_TARGET_ARCH_IA32
 static void MemMoveWrapper(void* dest, const void* src, size_t size) {
   memmove(dest, src, size);

src/platform.h

@@ -93,7 +93,6 @@ inline int lrint(double flt) {
 namespace v8 {
 namespace internal {
 
-double ceiling(double x);
 double modulo(double x, double y);
 
 // Custom implementation of math functions.