Remove redundant constraints (#969)

* Remove redundant constraints

* Changelog

Author: elefthei

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## Pending
 
 - Consolidated logic into `bitreverse_permutation_in_place` and made it public.
+- Remove redundant type constraints from `Pairing::G1Prepared`.
 
 ### Breaking changes
 
@@ -54,7 +55,7 @@
 
 - [\#736](https://github.com/arkworks-rs/algebra/pull/736) (`ark-ff`) Deprecate `divn()`, and use `core::ops::{Shr, ShrAssign}` instead.
 - [\#739](https://github.com/arkworks-rs/algebra/pull/739) (`ark-ff`) Deprecate `muln()`, and use `core::ops::{Shl, ShlAssign}` instead.
-- [\#771](https://github.com/arkworks-rs/algebra/pull/771) (`ark-ec`) Omit expensive  scalar multiplication in `is_in_correct_subgroup_assuming_on_curve()` for short Weierstrass curves of cofactor one.  
+- [\#771](https://github.com/arkworks-rs/algebra/pull/771) (`ark-ec`) Omit expensive  scalar multiplication in `is_in_correct_subgroup_assuming_on_curve()` for short Weierstrass curves of cofactor one.
 - [\#817](https://github.com/arkworks-rs/algebra/pull/817) (`ark-ec`) Relax the visibility for G2 ell coeffs and related algorithms.
 
 ### Bugfixes

ec/src/pairing.rs

@@ -51,8 +51,6 @@ pub trait Pairing: Sized + 'static + Copy + Debug + Sync + Send + Eq {
         + Debug
         + CanonicalSerialize
         + CanonicalDeserialize
-        + for<'a> From<&'a Self::G1>
-        + for<'a> From<&'a Self::G1Affine>
         + From<Self::G1>
         + From<Self::G1Affine>;
 
@@ -83,8 +81,6 @@ pub trait Pairing: Sized + 'static + Copy + Debug + Sync + Send + Eq {
         + Debug
         + CanonicalSerialize
         + CanonicalDeserialize
-        + for<'a> From<&'a Self::G2>
-        + for<'a> From<&'a Self::G2Affine>
         + From<Self::G2>
         + From<Self::G2Affine>;