[runtime] Remove unused %ToBool runtime function.

src/runtime/runtime.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_RUNTIME_RUNTIME_H_
 #define V8_RUNTIME_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/objects.h"
 #include "src/zone.h"
@@ skipping 445 matching lines @@
   F(IsPropertyEnumerable, 2, 1)                      \
   F(GetPropertyNames, 1, 1)                          \
   F(GetPropertyNamesFast, 1, 1)                      \
   F(GetOwnPropertyNames, 2, 1)                       \
   F(GetOwnElementNames, 1, 1)                        \
   F(GetInterceptorInfo, 1, 1)                        \
   F(GetNamedInterceptorPropertyNames, 1, 1)          \
   F(GetIndexedInterceptorElementNames, 1, 1)         \
   F(OwnKeys, 1, 1)                                   \
   F(ToFastProperties, 1, 1)                          \
-  F(ToBool, 1, 1)                                    \
   F(NewStringWrapper, 1, 1)                          \
   F(AllocateHeapNumber, 0, 1)                        \
   F(NewObject, 2, 1)                                 \
   F(NewObjectWithAllocationSite, 3, 1)               \
   F(FinalizeInstanceSize, 1, 1)                      \
   F(GlobalProxy, 1, 1)                               \
   F(LookupAccessor, 3, 1)                            \
   F(LoadMutableDouble, 2, 1)                         \
   F(TryMigrateInstance, 1, 1)                        \
   F(IsJSGlobalProxy, 1, 1)                           \
@@ skipping 658 matching lines @@
 inline bool Runtime::AtomicIsLockFree(uint32_t size) {
   return size == 1 || size == 2 || size == 4;
 }
 
 #endif
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_RUNTIME_RUNTIME_H_