drop memory size of subtree

it wasn't too accurate and the new measurement method of dropping the
database completely is better anyway

1 files changed, 0 insertions, 4 deletions

diff --git a/crates/ra_syntax/src/syntax_node.rs b/crates/ra_syntax/src/syntax_node.rs
index 98955832b..62e0967b7 100644
--- a/crates/ra_syntax/src/syntax_node.rs
+++ b/crates/ra_syntax/src/syntax_node.rs
@@ -173,10 +173,6 @@ impl SyntaxNode {
         })
     }
 
-    pub fn memory_size_of_subtree(&self) -> usize {
-        0
-    }
-
     pub fn debug_dump(&self) -> String {
         let mut level = 0;
         let mut buf = String::new();