remove unnecessary import

Author: samkim-crypto

token/confidential-transfer/proof-generation/src/transfer_with_fee.rs

@@ -19,7 +19,6 @@ use {
             CiphertextCommitmentEqualityProofData, PercentageWithCapProofData,
         },
     },
-    std::char::MAX,
 };
 
 const MAX_FEE_BASIS_POINTS: u64 = 10_000;