[SPARK-33109][BUILD][FOLLOW-UP] Remove the obsolete comment about bringing sbt-dependency-graph back
[SPARK-33109][BUILD][FOLLOW-UP] Remove the obsolete comment about bringing sbt-dependency-graph back

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

This PR proposes to remove an obsolete comment about adding the `sbt-dependency-graph` back in SBT plugins.

### Why are the changes needed?

sbt-dependency-graph is now built-in from SBT 1.4.0, see https://github.com/sbt/sbt/releases/tag/v1.4.0.

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

No.

### How was this patch tested?

Manually tested `./build/sbt dependencyTree`.

Closes #30085 from HyukjinKwon/SPARK-33109.

Authored-by: HyukjinKwon <2680965ad5aae29275c8fb10150cb10f5554e78b@apache.org>
Signed-off-by: Dongjoon Hyun <9b02cb7e37158797a8e22c559f7c5f5ecd28ea57@apple.com>

shuangshuangwang/spark,vinodkc/spark,BryanCutler/spark,JoshRosen/spark,zero323/spark,milliman/spark,gengliangwang/spark,witgo/spark,gengliangwang/spark,wangmiao1981/spark,JoshRosen/spark,shaneknapp/spark,srowen/spark,apache/spark,gengliangwang/spark,xuanyuanking/spark,wangmiao1981/spark,taroplus/spark,WeichenXu123/spark,jiangxb1987/spark,rednaxelafx/apache-spark,BryanCutler/spark,HyukjinKwon/spark,ueshin/apache-spark,taroplus/spark,srowen/spark,shuangshuangwang/spark,WeichenXu123/spark,JoshRosen/spark,apache/spark,jiangxb1987/spark,HyukjinKwon/spark,shuangshuangwang/spark,apache/spark,taroplus/spark,jiangxb1987/spark,dongjoon-hyun/spark,xuanyuanking/spark,chuckchen/spark,srowen/spark,hvanhovell/spark,hvanhovell/spark,maropu/spark,nchammas/spark,jiangxb1987/spark,xuanyuanking/spark,vinodkc/spark,vinodkc/spark,dongjoon-hyun/spark,shuangshuangwang/spark,xuanyuanking/spark,ueshin/apache-spark,gengliangwang/spark,wangmiao1981/spark,rednaxelafx/apache-spark,HyukjinKwon/spark,witgo/spark,zzcclp/spark,xuanyuanking/spark,holdenk/spark,gengliangwang/spark,HyukjinKwon/spark,ueshin/apache-spark,shaneknapp/spark,maropu/spark,ueshin/apache-spark,dongjoon-hyun/spark,witgo/spark,maropu/spark,xuanyuanking/spark,cloud-fan/spark,wangyum/spark,HyukjinKwon/spark,jiangxb1987/spark,BryanCutler/spark,zzcclp/spark,apache/spark,zero323/spark,taroplus/spark,ueshin/apache-spark,shaneknapp/spark,cloud-fan/spark,witgo/spark,shaneknapp/spark,mahak/spark,nchammas/spark,apache/spark,srowen/spark,dongjoon-hyun/spark,JoshRosen/spark,nchammas/spark,apache/spark,wangmiao1981/spark,witgo/spark,taroplus/spark,wangyum/spark,zero323/spark,milliman/spark,zero323/spark,nchammas/spark,gengliangwang/spark,wangmiao1981/spark,chuckchen/spark,zero323/spark,holdenk/spark,zzcclp/spark,zzcclp/spark,gengliangwang/spark,witgo/spark,dongjoon-hyun/spark,shuangshuangwang/spark,mahak/spark,BryanCutler/spark,JoshRosen/spark,holdenk/spark,wangyum/spark,BryanCutler/spark,chuckchen/spark,witgo/spark,cloud-fan/spark,taroplus/spark,BryanCutler/spark,shaneknapp/spark,mahak/spark,vinodkc/spark,milliman/spark,WeichenXu123/spark,chuckchen/spark,milliman/spark,zzcclp/spark,vinodkc/spark,holdenk/spark,WeichenXu123/spark,chuckchen/spark,WeichenXu123/spark,hvanhovell/spark,wangyum/spark,HyukjinKwon/spark,milliman/spark,nchammas/spark,maropu/spark,rednaxelafx/apache-spark,cloud-fan/spark,chuckchen/spark,wangyum/spark,holdenk/spark,hvanhovell/spark,zero323/spark,shuangshuangwang/spark,srowen/spark,wangyum/spark,wangmiao1981/spark,mahak/spark,wangyum/spark,maropu/spark,milliman/spark,chuckchen/spark,rednaxelafx/apache-spark,WeichenXu123/spark,JoshRosen/spark,rednaxelafx/apache-spark,nchammas/spark,vinodkc/spark,taroplus/spark,shaneknapp/spark,HyukjinKwon/spark,holdenk/spark,BryanCutler/spark,ueshin/apache-spark,srowen/spark,shaneknapp/spark,rednaxelafx/apache-spark,ueshin/apache-spark,JoshRosen/spark,hvanhovell/spark,hvanhovell/spark,wangmiao1981/spark,mahak/spark,xuanyuanking/spark,rednaxelafx/apache-spark,dongjoon-hyun/spark,cloud-fan/spark,cloud-fan/spark,zzcclp/spark,cloud-fan/spark,vinodkc/spark,zzcclp/spark,nchammas/spark,milliman/spark,mahak/spark,hvanhovell/spark,dongjoon-hyun/spark,maropu/spark,holdenk/spark,mahak/spark,jiangxb1987/spark,jiangxb1987/spark,maropu/spark,WeichenXu123/spark,apache/spark,shuangshuangwang/spark,srowen/spark,zero323/spark