[gardening] Remove unneeded implementations of none_of/count_if/count.

include/swift/Basic/Range.h

@@ -38,6 +38,7 @@
 #include <utility>
 #include "llvm/ADT/iterator_range.h"
 #include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/STLExtras.h"
 
 namespace swift {
   using llvm::make_range;
@@ -268,33 +269,6 @@ template <class T> EnumeratorRange<T> enumerate(T Begin, T End) {
   return EnumeratorRange<T>(Begin, End);
 }
 
-/// An adaptor of std::none_of for ranges.
-template <class Range, class Predicate>
-inline bool none_of(const Range &R, Predicate &&P) {
-  return std::none_of(R.begin(), R.end(), std::forward<Predicate>(P));
-}
-
-/// An adaptor of std::count for ranges.
-///
-/// We use std::result_of on Range::begin since llvm::iterator_range does not
-/// have a public typedef set to what is the underlying iterator.
-//typename std::iterator_traits<decltype(&Range::begin())>::difference_type
-template <class Range, class Value>
-inline auto count(const Range &R, Value V)
-  -> typename std::iterator_traits<decltype(R.begin())>::difference_type {
-  return std::count(R.begin(), R.end(), V);
-}
-
-/// An adaptor of std::count_if for ranges.
-///
-/// We use std::result_of on Range::begin since llvm::iterator_range does not
-/// have a public typedef set to what is the underlying iterator.
-template <class Range, class Predicate>
-inline auto count_if(const Range &R, Predicate &&P)
-  -> typename std::iterator_traits<decltype(R.begin())>::difference_type {
-  return std::count_if(R.begin(), R.end(), std::forward<Predicate>(P));
-}
-
 } // end namespace swift
 
 #endif // SWIFT_BASIC_RANGE_H

unittests/Basic/BlotMapVectorTest.cpp

@@ -17,6 +17,7 @@
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/raw_ostream.h"
 #include "gtest/gtest.h"
 #include <map>
@@ -254,7 +255,7 @@ bool CtorTesterSet::hasLiveTesters() const {
 }
 
 bool CtorTesterSet::numLiveTesters() const {
-  return count_if(Constructed, [](CtorTester *T) -> bool {
+  return llvm::count_if(Constructed, [](CtorTester *T) -> bool {
     assert(T);
     return !T->isIgnorableTester();
   });