diff --git a/crates/pep508-rs/src/marker/simplify.rs b/crates/pep508-rs/src/marker/simplify.rs
index 737371c5c..15219d1d6 100644
--- a/crates/pep508-rs/src/marker/simplify.rs
+++ b/crates/pep508-rs/src/marker/simplify.rs
@@ -285,26 +285,10 @@ pub(crate) fn collect_edges<'a, T>(
 where
     T: Ord + Clone + 'a,
 {
-    let len = map.len();
-
     let mut paths: IndexMap<_, Range<_>, FxBuildHasher> = IndexMap::default();
-    for (i, (range, tree)) in map.enumerate() {
-        let (mut start, mut end) = range.bounding_range().unwrap();
-        match (start, end) {
-            (Bound::Included(v1), Bound::Included(v2)) if v1 == v2 => {}
-            _ => {
-                // Expand the range of this variable to be unbounded.
-                // This helps remove redundant expressions such as `python_version >= '3.7'`
-                // when the range has already been restricted to `['3.7', inf)`
-                if i == 0 {
-                    start = Bound::Unbounded;
-                }
-                if i == len - 1 {
-                    end = Bound::Unbounded;
-                }
-            }
-        }
-
+    for (range, tree) in map {
+        // OK because all ranges are guaranteed to be non-empty.
+        let (start, end) = range.bounding_range().unwrap();
         // Combine the ranges.
         let range = Range::from_range_bounds((start.cloned(), end.cloned()));
         paths