diff --git a/Configurations.md b/Configurations.md
index f155abe63ca..7726193fafe 100644
--- a/Configurations.md
+++ b/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
diff --git a/src/config.rs b/src/config.rs
index 1a32b4a9c6c..0f333337bf3 100644
--- a/src/config.rs
+++ b/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,
         }
     }
diff --git a/tests/source/configs-fn_args_density-compressed_if_empty.rs b/tests/source/configs-fn_args_density-compressed_if_empty.rs
deleted file mode 100644
index 3506ae8ea5c..00000000000
--- a/tests/source/configs-fn_args_density-compressed_if_empty.rs
+++ /dev/null
@@ -1,20 +0,0 @@
-// rustfmt-fn_args_density: CompressedIfEmpty
-// Function arguments density
-
-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: onsectetur, adipiscing: Adipiscing, elit: Elit);
-
-    // FIXME: Previous line should be formatted like this:
-    // fn lorem(ipsum: Ipsum, dolor: Dolor, sit: Sit, amet: Amet, consectetur: onsectetur,
-    //          adipiscing: Adipiscing, elit: Elit);
-
-    fn lorem(ipsum: Ipsum, dolor: Dolor, sit: Sit, amet: Amet, consectetur: onsectetur, adipiscing: Adipiscing, elit: Elit) {
-        // body
-    }
-}
diff --git a/tests/target/configs-fn_args_density-compressed_if_empty.rs b/tests/target/configs-fn_args_density-compressed_if_empty.rs
deleted file mode 100644
index 1a0f127f59c..00000000000
--- a/tests/target/configs-fn_args_density-compressed_if_empty.rs
+++ /dev/null
@@ -1,36 +0,0 @@
-// rustfmt-fn_args_density: CompressedIfEmpty
-// Function arguments density
-
-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: onsectetur,
-        adipiscing: Adipiscing,
-        elit: Elit,
-    );
-
-    // FIXME: Previous line should be formatted like this:
-    // fn lorem(ipsum: Ipsum, dolor: Dolor, sit: Sit, amet: Amet, consectetur: onsectetur,
-    //          adipiscing: Adipiscing, elit: Elit);
-
-    fn lorem(
-        ipsum: Ipsum,
-        dolor: Dolor,
-        sit: Sit,
-        amet: Amet,
-        consectetur: onsectetur,
-        adipiscing: Adipiscing,
-        elit: Elit,
-    ) {
-        // body
-    }
-}