Remove unused code

src/Storages/MergeTree/VectorSimilarityCondition.h

@@ -143,6 +143,7 @@ private:
     void traverseOrderByAST(const ASTPtr & node, RPN & rpn);
 
     /// Returns true and stores ANNExpr if the query has valid WHERE section
+    /// TODO NOT implemented, WHERE does not supported.
     static bool matchRPNWhere(RPN & rpn, Info & info);
 
     /// Returns true and stores ANNExpr if the query has valid ORDERBY section
@@ -151,9 +152,6 @@ private:
     /// Returns true and stores Length if we have valid LIMIT clause in query
     static bool matchRPNLimit(RPNElement & rpn, UInt64 & limit);
 
-    /// Matches dist function, reference vector, column name
-    static bool matchMainParts(RPN::iterator & iter, const RPN::iterator & end, Info & info);
-
     /// Gets float or int from AST node
     static float getFloatOrIntLiteralOrPanic(const RPN::iterator& iter);