[SPARK-44540][UI] Remove unused stylesheet and javascript files of jsonFormatter

### What changes were proposed in this pull request?

This PR safely removes unused stylesheet and javascript files of `jsonFormatter`

### Why are the changes needed?

Simplify css/js dependencies for UI

### Does this PR introduce _any_ user-facing change?

no

### How was this patch tested?

built and verified locally with UI

Closes #42145 from yaooqinn/SPARK-44540.

Authored-by: Kent Yao <[email protected]>
Signed-off-by: Kent Yao <[email protected]>

Author: yaooqinn

LICENSE

@@ -213,7 +213,6 @@ Apache Software Foundation License 2.0
 common/network-common/src/main/java/org/apache/spark/network/util/LimitedInputStream.java
 core/src/main/java/org/apache/spark/util/collection/TimSort.java
 core/src/main/resources/org/apache/spark/ui/static/bootstrap*
-core/src/main/resources/org/apache/spark/ui/static/jsonFormatter*
 core/src/main/resources/org/apache/spark/ui/static/vis*
 docs/js/vendor/bootstrap.js
 connector/spark-ganglia-lgpl/src/main/java/com/codahale/metrics/ganglia/GangliaReporter.java

LICENSE-binary

@@ -412,7 +412,6 @@ com.google.cloud.bigdataoss:gcs-connector
 
 core/src/main/java/org/apache/spark/util/collection/TimSort.java
 core/src/main/resources/org/apache/spark/ui/static/bootstrap*
-core/src/main/resources/org/apache/spark/ui/static/jsonFormatter*
 core/src/main/resources/org/apache/spark/ui/static/vis*
 docs/js/vendor/bootstrap.js
 

core/src/main/resources/org/apache/spark/ui/static/jsonFormatter.min.css

@@ -258,15 +258,12 @@ private[spark] object UIUtils extends Logging {
     <link rel="stylesheet"
           href={prependBaseUri(request, "/static/dataTables.bootstrap4.1.13.5.min.css")}
           type="text/css"/>
-    <link rel="stylesheet"
-          href={prependBaseUri(request, "/static/jsonFormatter.min.css")} type="text/css"/>
     <link rel="stylesheet"
           href={prependBaseUri(request, "/static/webui-dataTables.css")} type="text/css"/>
     <script src={prependBaseUri(request, "/static/jquery.dataTables.1.13.5.min.js")}></script>
     <script src={prependBaseUri(request, "/static/jquery.cookies.2.2.0.min.js")}></script>
     <script src={prependBaseUri(request, "/static/jquery.blockUI.min.js")}></script>
     <script src={prependBaseUri(request, "/static/dataTables.bootstrap4.1.13.5.min.js")}></script>
-    <script src={prependBaseUri(request, "/static/jsonFormatter.min.js")}></script>
     <script src={prependBaseUri(request, "/static/jquery.mustache.js")}></script>
   }
 

core/src/main/resources/org/apache/spark/ui/static/jsonFormatter.min.js

@@ -42,8 +42,6 @@ jquery.blockUI.min.js
 jquery.cookies.2.2.0.min.js
 jquery.dataTables.*.min.js
 jquery.mustache.js
-jsonFormatter.min.css
-jsonFormatter.min.js
 .*\.avsc
 .*\.txt
 .*\.json