Remove unused code

Tests/OpenFeatureTests/HookSupportTests.swift

@@ -47,18 +47,3 @@ final class HookSupportTests: XCTestCase {
         XCTAssertEqual(hook.errorCalled, 1)
     }
 }
-extension HookSupportTests {
-    class StringHookMock: StringHook {
-        private var value: EvaluationContext
-
-        init(key: String, value: String) {
-            let ctx = MutableContext()
-            ctx.add(key: key, value: .string(value))
-            self.value = ctx
-        }
-
-        public func before(ctx: HookContext<String>, hints: [String: Any]) -> EvaluationContext? {
-            return value
-        }
-    }
-}

Tests/OpenFeatureTests/OpenFeatureClientTests.swift

@@ -23,56 +23,4 @@ extension OpenFeatureClientTests {
             numCalls += 1
         }
     }
-
-    class TestProvider: FeatureProvider {
-        var hooks: [OpenFeature.AnyHook] = []
-        var metadata: OpenFeature.Metadata = TestMetadata()
-        private var targetingKey: String
-
-        func onContextSet(oldContext: OpenFeature.EvaluationContext, newContext: OpenFeature.EvaluationContext) {
-            // no-op
-        }
-
-        func initialize(initialContext: OpenFeature.EvaluationContext) {
-            // no-op
-        }
-
-        init(targetingKey: String) {
-            self.targetingKey = targetingKey
-        }
-
-        func getBooleanEvaluation(key: String, defaultValue: Bool) throws
-            -> OpenFeature.ProviderEvaluation<Bool>
-        {
-            return ProviderEvaluation(value: true)
-        }
-
-        func getStringEvaluation(key: String, defaultValue: String) throws
-            -> OpenFeature.ProviderEvaluation<String>
-        {
-            return ProviderEvaluation(value: "")
-        }
-
-        func getIntegerEvaluation(key: String, defaultValue: Int64) throws
-            -> OpenFeature.ProviderEvaluation<Int64>
-        {
-            return ProviderEvaluation(value: 0)
-        }
-
-        func getDoubleEvaluation(key: String, defaultValue: Double) throws
-            -> OpenFeature.ProviderEvaluation<Double>
-        {
-            return ProviderEvaluation(value: 0.0)
-        }
-
-        func getObjectEvaluation(key: String, defaultValue: OpenFeature.Value)
-            throws -> OpenFeature.ProviderEvaluation<OpenFeature.Value>
-        {
-            return ProviderEvaluation(value: .null)
-        }
-    }
-
-    public struct TestMetadata: Metadata {
-        public var name: String? = "test"
-    }
 }