Remove `From` impls for unstable types that break inference

Adding additional `From` implementations that fit `f32::from(<unaffixed
float>)` broke inference. Remove these for now.

Fixes: <https://github.com/rust-lang/rust/issues/123824>

1 files changed, 9 insertions, 0 deletions

diff --git a/tests/ui/inference/untyped-primitives.rs b/tests/ui/inference/untyped-primitives.rs
new file mode 100644
index 00000000000..8515ca79903
--- /dev/null
+++ b/tests/ui/inference/untyped-primitives.rs
@@ -0,0 +1,9 @@
+//@ check-pass
+// issue: rust-lang/rust#123824
+// This test is a sanity check and does not enforce any stable API, so may be
+// removed at a future point.
+
+fn main() {
+    let x = f32::from(3.14);
+    let y = f64::from(3.14);
+}