Remove DatasetTests (#1111)

Author: texasmichelle

Tests/TensorFlowTests/CMakeLists.txt

@@ -32,7 +32,6 @@ add_library(TensorFlowTests
 
   OperatorTests/BasicTests.swift
   OperatorTests/ComparisonTests.swift
-  OperatorTests/DatasetTests.swift
   OperatorTests/ImageTests.swift
   OperatorTests/LinearAlgebraTests.swift
   OperatorTests/MathTests.swift

Tests/TensorFlowTests/OperatorTests/DatasetTests.swift

@@ -21,7 +21,6 @@ import XCTest
       testCase(BasicOperatorTests.allTests),
       testCase(ComparisonOperatorTests.allTests),
       testCase(ContextTests.allTests),
-      testCase(DatasetTests.allTests),
       testCase(EpochsTests.allTests),
       testCase(ImageTests.allTests),
       testCase(InitializerTests.allTests),