Remove PR-specific comments from code

Clean up comments that reference implementation details
rather than describing what the code does.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: msrathore-db

csharp/src/Drivers/Apache/Hive2/HiveServer2Connection.cs

@@ -653,7 +653,6 @@ public override IArrowArrayStream GetObjects(GetObjectsDepth depth, string? cata
                                                        (bool?)null;
 
                                 // Get precision/scale from Thrift using SetPrecisionScaleAndTypeName
-                                // This preserves the original Thrift behavior of using server-provided values
                                 var tempTableInfo = new TableInfo(string.Empty);
                                 SetPrecisionScaleAndTypeName(colType, typeName, tempTableInfo, columnSize, decimalDigits);
 

csharp/src/Drivers/Apache/Hive2/HiveServer2Statement.cs

@@ -625,8 +625,6 @@ protected internal QueryResult EnhanceGetColumnsResult(Schema originalSchema, IR
                 );
 
                 // Extract values with fallback to Thrift-provided values
-                // This preserves the existing behavior where parsed values take precedence,
-                // but Thrift values are used if parsing fails or returns null
                 string baseTypeName = record.BaseTypeName ?? typeName ?? string.Empty;
                 int finalColumnSize = record.XdbcColumnSize ?? columnSize;
                 int finalDecimalDigits = record.XdbcDecimalDigits ?? decimalDigits;

csharp/src/Drivers/Apache/Hive2/Metadata/MetadataFieldPopulator.cs

@@ -254,7 +254,7 @@ public virtual ForeignKeyMetadataRecord PopulateForeignKeyMetadata(
 
         /// <summary>
         /// Virtual extension point for populating vendor-specific custom fields on column metadata.
-        /// Override in derived classes to add Delta Lake, Iceberg, or other vendor-specific fields.
+        /// Override in derived classes to add additional metadata fields beyond the standard JDBC/ODBC columns.
         /// </summary>
         /// <param name="record">The column metadata record to populate</param>
         /// <param name="customData">Custom data from the vendor-specific protocol</param>

csharp/src/Drivers/Apache/Spark/SparkConnection.cs

@@ -115,7 +115,6 @@ internal override void SetPrecisionScaleAndTypeName(
                 default:
                     {
                         // For all other types (INTEGER, BIGINT, FLOAT, etc.), use null for precision/scale
-                        // This preserves the original Thrift behavior
                         tableInfo?.Precision.Add(null);
                         tableInfo?.Scale.Add(null);
                         tableInfo?.BaseTypeName.Add(baseTypeName);