Revert changes in Package.swift

Author: kateinoigakukun

Package.swift

@@ -7,7 +7,6 @@ import PackageDescription
 let shouldBuildForEmbedded = Context.environment["JAVASCRIPTKIT_EXPERIMENTAL_EMBEDDED_WASM"].flatMap(Bool.init) ?? false
 let useLegacyResourceBundling =
     Context.environment["JAVASCRIPTKIT_USE_LEGACY_RESOURCE_BUNDLING"].flatMap(Bool.init) ?? false
-let enableTracingByEnv = Context.environment["JAVASCRIPTKIT_ENABLE_TRACING"].flatMap(Bool.init) ?? false
 
 let testingLinkerFlags: [LinkerSetting] = [
     .unsafeFlags([
@@ -53,7 +52,6 @@ let package = Package(
             swiftSettings: [
                 .enableExperimentalFeature("Extern")
             ]
-                + (enableTracingByEnv ? [.define("Tracing")] : [])
                 + (shouldBuildForEmbedded
                     ? [
                         .enableExperimentalFeature("Embedded"),
@@ -74,7 +72,7 @@ let package = Package(
             dependencies: ["JavaScriptKit"],
             swiftSettings: [
                 .enableExperimentalFeature("Extern")
-            ] + (enableTracingByEnv ? [.define("Tracing")] : []),
+            ],
             linkerSettings: testingLinkerFlags
         ),