Removing unused method

Summary: I found a function that I couldn't find any references. Let's delete them.

Reviewed By: zzhao0

Differential Revision: D30843267

fbshipit-source-id: 44f13f86f7313ac974b4c138d1165cbd3f0388c6

velox/dwio/common/FilterNode.h

@@ -139,25 +139,11 @@ struct FilterNode {
         expression,
         partitionKey);
   }
-
-  template <typename T>
-  static std::vector<FilterNode> fromColumns(const std::vector<T>& cols);
 };
 
 // Define two aliases to capture column filter types
 using ColumnFilter = std::vector<FilterNode>;
 
-template <typename T>
-std::vector<FilterNode> FilterNode::fromColumns(const std::vector<T>& cols) {
-  std::vector<FilterNode> nodes;
-  nodes.reserve(cols.size());
-  for (auto& col : cols) {
-    nodes.push_back(col);
-  }
-
-  return nodes;
-}
-
 /**
  * This class is exact physical schema of data (file)
  * with filter node information associated with it.