Remove CompressedIfEmpty option from fn_args_density

It was identical to Tall

Author: nrc

Configurations.md

@@ -636,7 +636,7 @@ See also [`comment_width`](#comment_width).
 Argument density in functions
 
 - **Default value**: `"Tall"`
-- **Possible values**: `"Compressed"`, `"CompressedIfEmpty"`, `"Tall"`, `"Vertical"`
+- **Possible values**: `"Compressed"`, `"Tall"`, `"Vertical"`
 
 #### `"Tall"` (default):
 
@@ -696,35 +696,6 @@ trait Lorem {
 }
 ```
 
-#### `"CompressedIfEmpty"`:
-
-```rust
-trait Lorem {
-    fn lorem(ipsum: Ipsum, dolor: Dolor, sit: Sit, amet: Amet);
-
-    fn lorem(ipsum: Ipsum, dolor: Dolor, sit: Sit, amet: Amet) {
-        // body
-    }
-
-    fn lorem(
-        ipsum: Ipsum, dolor: Dolor, sit: Sit, amet: Amet, consectetur: Consectetur,
-        adipiscing: Adipiscing, elit: Elit,
-    );
-
-    fn lorem(
-        ipsum: Ipsum,
-        dolor: Dolor,
-        sit: Sit,
-        amet: Amet,
-        consectetur: Consectetur,
-        adipiscing: Adipiscing,
-        elit: Elit,
-    ) {
-        // body
-    }
-}
-```
-
 #### `"Vertical"`:
 
 ```rust

src/config.rs

@@ -77,8 +77,6 @@ configuration_option_enum! { Density:
     Compressed,
     // Use more lines.
     Tall,
-    // Try to compress if the body is empty.
-    CompressedIfEmpty,
     // Place every item on a separate line.
     Vertical,
 }
@@ -95,7 +93,7 @@ impl Density {
     pub fn to_list_tactic(self) -> ListTactic {
         match self {
             Density::Compressed => ListTactic::Mixed,
-            Density::Tall | Density::CompressedIfEmpty => ListTactic::HorizontalVertical,
+            Density::Tall => ListTactic::HorizontalVertical,
             Density::Vertical => ListTactic::Vertical,
         }
     }