Removed some duplicate math tests (#149).

Author: eaplatanios

Tests/TensorFlowTests/OperatorTests/MathTests.swift

@@ -346,14 +346,10 @@ final class MathOperatorTests: XCTestCase {
         ("testExpm1", testExpm1),
         ("testSign", testSign),
         ("testLogSigmoid", testLogSigmoid),
-        ("testReduction", testReduction),
-        ("testCosineSimilarity", testCosineSimilarity),
-        ("testElu",testElu),
-        ("testGelu", testGelu),
-        ("testArgmax", testArgmax),
         ("testSoftplus", testSoftplus),
         ("testSoftsign", testSoftsign),
         ("testElu",testElu),
+        ("testGelu", testGelu),
         ("testLeakyRelu", testLeakyRelu),
         ("testIsFinite", testIsFinite),
         ("testIsInfinite", testIsInfinite),