docs: drop stale Sonar references and fix metrics changelog link

Author: Little-Peony

CONTRIBUTING.md

@@ -147,7 +147,7 @@ We would like all developers to follow a standard development flow and coding st
 2. Review the code before submission.
 3. Run standardized tests.
 
-`Sonar`-scanner and CI checks (GitHub Actions) will be automatically triggered when a pull request has been submitted. When a PR passes all the checks, the **java-tron** maintainers will then review the PR and offer feedback and modifications when necessary.  Once adopted, the PR will be closed and merged into the `develop` branch.
+CI checks (GitHub Actions) will be automatically triggered when a pull request has been submitted. When a PR passes all the checks, the **java-tron** maintainers will then review the PR and offer feedback and modifications when necessary.  Once adopted, the PR will be closed and merged into the `develop` branch.
 
 We are glad to receive your pull requests and will try our best to review them as soon as we can. Any pull request is welcome, even if it is for a typo.
 
@@ -158,7 +158,6 @@ Please do not be discouraged if your pull request is not accepted, as it may be
 Please make sure your submission meets the following code style:
 
 - The code must conform to [Google Code Style](https://google.github.io/styleguide/javaguide.html).
-- The code must have passed the Sonar scanner test.
 - The code has to be pulled from the `develop` branch.
 - The commit message should start with a verb, whose initial should not be capitalized.
 - The commit message title should be between 10 and 72 characters in length.

README.md

@@ -204,7 +204,7 @@ More detailed guides live in the [`docs/`](./docs) directory:
 - **Protocol**
   - [TRON Protobuf Protocol Document](./docs/protobuf-protocol-document.md) — the maintained, authoritative Protobuf protocol reference
 - **Observability**
-  - [Metrics Changelog](./docs/metrics_changelog.md) — Prometheus metric additions, changes, and removals across java-tron releases
+  - [Metrics Changelog](./docs/metrics-changelog.md) — Prometheus metric additions, changes, and removals across java-tron releases
 
 # Community
 

docs/metrics_changelog.md docs/metrics-changelog.mddocs/metrics_changelog.md renamed to docs/metrics-changelog.md

@@ -19,7 +19,7 @@ This file tracks Prometheus metric additions, changes, and removals in java-tron
 
 **Pre-4.8.2 Baseline**
 
-Snapshot of metrics emitted prior to this changelog. Per-version provenance is not tracked here; consult `git log` on [`common/src/main/java/org/tron/common/prometheus/`](common/src/main/java/org/tron/common/prometheus/) for exact origin of each metric.
+Snapshot of metrics emitted prior to this changelog. Per-version provenance is not tracked here; consult `git log` on [`common/src/main/java/org/tron/common/prometheus/`](../common/src/main/java/org/tron/common/prometheus/) for exact origin of each metric.
 
 ### Existing Metrics
 

framework/build.gradle

@@ -1,6 +1,5 @@
 plugins {
     id "org.gradle.test-retry" version "1.5.9"
-    id "org.sonarqube" version "2.6"
     id "com.gorylenko.gradle-git-properties" version "2.4.1"
 }
 

plugins/build.gradle

@@ -1,7 +1,3 @@
-plugins {
-    id "org.sonarqube" version "2.6"
-}
-
 apply plugin: 'application'
 apply plugin: 'checkstyle'