[examples] Simplify examples's Package.swift (#454)

remove the platform dance on all examples.

Author: sebsto

Examples/APIGateway/Package.swift

@@ -5,15 +5,9 @@ import PackageDescription
 // needed for CI to test the local version of the library
 import struct Foundation.URL
 
-#if os(macOS)
-let platforms: [PackageDescription.SupportedPlatform]? = [.macOS(.v15)]
-#else
-let platforms: [PackageDescription.SupportedPlatform]? = nil
-#endif
-
 let package = Package(
     name: "swift-aws-lambda-runtime-example",
-    platforms: platforms,
+    platforms: [.macOS(.v15)],
     products: [
         .executable(name: "APIGatewayLambda", targets: ["APIGatewayLambda"])
     ],

Examples/BackgroundTasks/Package.swift

@@ -5,15 +5,9 @@ import PackageDescription
 // needed for CI to test the local version of the library
 import struct Foundation.URL
 
-#if os(macOS)
-let platforms: [PackageDescription.SupportedPlatform]? = [.macOS(.v15)]
-#else
-let platforms: [PackageDescription.SupportedPlatform]? = nil
-#endif
-
 let package = Package(
     name: "swift-aws-lambda-runtime-example",
-    platforms: platforms,
+    platforms: [.macOS(.v15)],
     products: [
         .executable(name: "BackgroundTasks", targets: ["BackgroundTasks"])
     ],

Examples/CDK/Package.swift

@@ -5,15 +5,9 @@ import PackageDescription
 // needed for CI to test the local version of the library
 import struct Foundation.URL
 
-#if os(macOS)
-let platforms: [PackageDescription.SupportedPlatform]? = [.macOS(.v15)]
-#else
-let platforms: [PackageDescription.SupportedPlatform]? = nil
-#endif
-
 let package = Package(
     name: "swift-aws-lambda-runtime-example",
-    platforms: platforms,
+    platforms: [.macOS(.v15)],
     products: [
         .executable(name: "APIGatewayLambda", targets: ["APIGatewayLambda"])
     ],

Examples/HelloWorld/Package.swift

@@ -5,15 +5,9 @@ import PackageDescription
 // needed for CI to test the local version of the library
 import struct Foundation.URL
 
-#if os(macOS)
-let platforms: [PackageDescription.SupportedPlatform]? = [.macOS(.v15)]
-#else
-let platforms: [PackageDescription.SupportedPlatform]? = nil
-#endif
-
 let package = Package(
     name: "swift-aws-lambda-runtime-example",
-    platforms: platforms,
+    platforms: [.macOS(.v15)],
     products: [
         .executable(name: "MyLambda", targets: ["MyLambda"])
     ],

Examples/S3_AWSSDK/Package.swift

@@ -5,15 +5,9 @@ import PackageDescription
 // needed for CI to test the local version of the library
 import struct Foundation.URL
 
-#if os(macOS)
-let platforms: [PackageDescription.SupportedPlatform]? = [.macOS(.v15)]
-#else
-let platforms: [PackageDescription.SupportedPlatform]? = nil
-#endif
-
 let package = Package(
     name: "AWSSDKExample",
-    platforms: platforms,
+    platforms: [.macOS(.v15)],
     products: [
         .executable(name: "AWSSDKExample", targets: ["AWSSDKExample"])
     ],

Examples/S3_Soto/Package.swift

@@ -5,15 +5,9 @@ import PackageDescription
 // needed for CI to test the local version of the library
 import struct Foundation.URL
 
-#if os(macOS)
-let platforms: [PackageDescription.SupportedPlatform]? = [.macOS(.v15)]
-#else
-let platforms: [PackageDescription.SupportedPlatform]? = nil
-#endif
-
 let package = Package(
     name: "SotoExample",
-    platforms: platforms,
+    platforms: [.macOS(.v15)],
     products: [
         .executable(name: "SotoExample", targets: ["SotoExample"])
     ],

Examples/Streaming/Package.swift

@@ -5,15 +5,9 @@ import PackageDescription
 // needed for CI to test the local version of the library
 import struct Foundation.URL
 
-#if os(macOS)
-let platforms: [PackageDescription.SupportedPlatform]? = [.macOS(.v15)]
-#else
-let platforms: [PackageDescription.SupportedPlatform]? = nil
-#endif
-
 let package = Package(
     name: "swift-aws-lambda-runtime-example",
-    platforms: platforms,
+    platforms: [.macOS(.v15)],
     products: [
         .executable(name: "StreamingNumbers", targets: ["StreamingNumbers"])
     ],