Merge cockroachdb#107628

107628: sql: delete unused NewUndefinedFunctionError function r=chengxiong-ruan a=chengxiong-ruan

Epic: None

Release note: None

Co-authored-by: Chengxiong Ruan <[email protected]>

Author: craig[bot]

pkg/sql/sqlerrors/errors.go

@@ -160,12 +160,6 @@ func NewUndefinedTypeError(name tree.NodeFormatter) error {
 	return pgerror.Newf(pgcode.UndefinedObject, "type %q does not exist", tree.ErrString(name))
 }
 
-// NewUndefinedFunctionError creates an error that represents a missing user
-// defined function.
-func NewUndefinedFunctionError(fn string) error {
-	return pgerror.Newf(pgcode.UndefinedFunction, "function %q does not exist", fn)
-}
-
 // NewUndefinedRelationError creates an error that represents a missing database table or view.
 func NewUndefinedRelationError(name tree.NodeFormatter) error {
 	return pgerror.Newf(pgcode.UndefinedTable,