No longer specify gradle threads in github actions. (#3643)

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
         with:
           fetch-depth: 0
       - uses: gradle/wrapper-validation-action@v1
-      - run: ./gradlew check build publishToMavenLocal --stacktrace --warning-mode=fail -Porg.gradle.parallel.threads=4
+      - run: ./gradlew check build publishToMavenLocal --stacktrace --warning-mode=fail
       - uses: Juuxel/publish-checkstyle-report@v1
         if: ${{ failure() }}
         with:

.github/workflows/release.yml

@@ -22,7 +22,7 @@ jobs:
           context: changelog
           workflow_id: release.yml
       - uses: gradle/wrapper-validation-action@v1
-      - run: ./gradlew checkVersion build publish publishMods --stacktrace -Porg.gradle.parallel.threads=4
+      - run: ./gradlew checkVersion build publish publishMods --stacktrace
         env:
           MAVEN_URL: ${{ secrets.MAVEN_URL }}
           MAVEN_USERNAME: ${{ secrets.MAVEN_USERNAME }}