Build: remove unused parameter (#6587)

This parameter was unused, remove it to simplify he signature.
Identified when trying to investigate the removal of the use of the
builtin command in llbuild.

Author: compnerd

Sources/Build/LLBuildManifestBuilder.swift

@@ -619,7 +619,6 @@ extension LLBuildManifestBuilder {
             inputs: inputs,
             outputs: cmdOutputs,
             executable: self.buildParameters.toolchain.swiftCompilerPath,
-            packageName: target.package.identity.description.spm_mangledToC99ExtendedIdentifier(),
             moduleName: target.target.c99name,
             moduleAliases: target.target.moduleAliases,
             moduleOutputPath: target.moduleOutputPath,

Sources/LLBuildManifest/BuildManifest.swift

@@ -164,7 +164,6 @@ public struct BuildManifest {
         inputs: [Node],
         outputs: [Node],
         executable: AbsolutePath,
-        packageName: String,
         moduleName: String,
         moduleAliases: [String: String]?,
         moduleOutputPath: AbsolutePath,