Remove ResolvedNode.permissions (#593)

Reason: Too much serialization making lua calls slow.

docs/en/src/column-renderer.md

@@ -297,7 +297,6 @@ It contains the following fields.
 - [is_readonly][11]
 - [mime_essence][12]
 - [size][13]
-- [permissions][15]
 - [human_size][14]
 - [created][34]
 - [last_modified][35]

src/node.rs

@@ -37,7 +37,6 @@ pub struct ResolvedNode {
     pub is_readonly: bool,
     pub mime_essence: String,
     pub size: u64,
-    pub permissions: Permissions,
     pub human_size: String,
     pub created: Option<u128>,
     pub last_modified: Option<u128>,
@@ -99,7 +98,6 @@ impl ResolvedNode {
             is_readonly,
             mime_essence,
             size,
-            permissions,
             human_size,
             created,
             last_modified,