chore(addBuildPhase): remove unused variable buildPhaseSection (#175)

Author: erisu

lib/pbxProject.js

@@ -921,7 +921,6 @@ PBXProject.prototype.addTargetDependency = function (target, dependencyTargets)
  * @returns {AddBuildPhaseResults} object containing the build phase & uuid
  */
 PBXProject.prototype.addBuildPhase = function (filePathsArray, buildPhaseType, comment, target, optionsOrFolderType, subfolderPath) {
-    let buildPhaseSection;
     const fileReferenceSection = this.pbxFileReferenceSection();
     const buildFileSection = this.pbxBuildFileSection();
     const buildPhaseUuid = this.generateUuid();
@@ -1013,11 +1012,6 @@ PBXProject.prototype.addBuildPhase = function (filePathsArray, buildPhaseType, c
         buildPhase.files.push(pbxBuildPhaseObj(file));
     }
 
-    if (buildPhaseSection) {
-        buildPhaseSection[buildPhaseUuid] = buildPhase;
-        buildPhaseSection[commentKey] = comment;
-    }
-
     return { uuid: buildPhaseUuid, buildPhase };
 };