[MINOR][SQL] Remove unnecessary MiMa excludes

### What changes were proposed in this pull request?
I found a few unnecessary MiMa excludes when auditing SQL binary incompatible changes.

### Why are the changes needed?
These MiMa excludes are not required any more, so remove.

### Does this PR introduce any user-facing change?
No

### How was this patch tested?
Manually tested

Closes apache#27729 from huaxingao/mima.

Authored-by: Huaxin Gao <[email protected]>
Signed-off-by: HyukjinKwon <[email protected]>

Author: huaxingao

project/MimaExcludes.scala

@@ -216,14 +216,6 @@ object MimaExcludes {
     ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.spark.ml.regression.RandomForestRegressionModel.setMinInstancesPerNode"),
     ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.spark.ml.regression.RandomForestRegressionModel.setNumTrees"),
 
-    // [SPARK-26124] Update plugins, including MiMa
-    ProblemFilters.exclude[InheritedNewAbstractMethodProblem]("org.apache.spark.sql.sources.v2.reader.SupportsPushDownRequiredColumns.build"),
-    ProblemFilters.exclude[InheritedNewAbstractMethodProblem]("org.apache.spark.sql.sources.v2.reader.SupportsReportStatistics.fullSchema"),
-    ProblemFilters.exclude[InheritedNewAbstractMethodProblem]("org.apache.spark.sql.sources.v2.reader.SupportsReportStatistics.planInputPartitions"),
-    ProblemFilters.exclude[InheritedNewAbstractMethodProblem]("org.apache.spark.sql.sources.v2.reader.SupportsReportPartitioning.fullSchema"),
-    ProblemFilters.exclude[InheritedNewAbstractMethodProblem]("org.apache.spark.sql.sources.v2.reader.SupportsReportPartitioning.planInputPartitions"),
-    ProblemFilters.exclude[InheritedNewAbstractMethodProblem]("org.apache.spark.sql.sources.v2.reader.SupportsPushDownFilters.build"),
-
     // [SPARK-26090] Resolve most miscellaneous deprecation and build warnings for Spark 3
     ProblemFilters.exclude[MissingClassProblem]("org.apache.spark.mllib.stat.test.BinarySampleBeanInfo"),
     ProblemFilters.exclude[MissingClassProblem]("org.apache.spark.mllib.regression.LabeledPointBeanInfo"),