[benchmark] Remove HashQuadratic

This was obsoleted by DictionaryCopy.

Author: palimondo

benchmark/CMakeLists.txt

@@ -89,7 +89,6 @@ set(SWIFT_BENCH_MODULES
     single-source/FloatingPointPrinting
     single-source/Hanoi
     single-source/Hash
-    single-source/HashQuadratic
     single-source/Histogram
     single-source/InsertCharacter  
     single-source/Integrate

benchmark/single-source/HashQuadratic.swift

@@ -77,7 +77,6 @@ import FlattenList
 import FloatingPointPrinting
 import Hanoi
 import Hash
-import HashQuadratic
 import Histogram
 import InsertCharacter
 import Integrate
@@ -249,7 +248,6 @@ registerBenchmark(FlattenListFlatMap)
 registerBenchmark(FloatingPointPrinting)
 registerBenchmark(Hanoi)
 registerBenchmark(HashTest)
-registerBenchmark(HashQuadratic)
 registerBenchmark(Histogram)
 registerBenchmark(InsertCharacter)
 registerBenchmark(IntegrateTest)