fix: remove HLL

Signed-off-by: 0xPoe <techregister@pm.me>

Author: 0xPoe

proto/analyze.proto

@@ -137,12 +137,6 @@ message FMSketch {
     repeated uint64 hashset = 2;
 }
 
-// HLLSketch is used to count distinct values for columns.
-// message HLLSketch {
-//     optional uint32 b = 1 [(gogoproto.nullable) = false];
-//     optional bytes registers = 2;
-// }
-
 // SampleCollector is used for collect samples and calculate the count and ndv of an column.
 message SampleCollector {
     repeated bytes samples = 1;
@@ -161,8 +155,6 @@ message RowSampleCollector {
     repeated int64 total_size = 5;
     repeated FMSketch f1_sketch = 6;
     optional int64 sketch_sample_count = 7 [(gogoproto.nullable) = false];
-    // repeated HLLSketch hll_sketch = 8;
-    // repeated HLLSketch hll_f1_sketch = 9;
 }
 
 message RowSample {