Remove redundant field (#179)

fix(cargo): remove redundant field

Remove the `license` field because `license-file` is used.

Author: parfeon

.pubnub.yml

@@ -4,7 +4,7 @@ schema: 1
 scm: github.com/pubnub/rust
 files: []
 changelog:
-  - date: 2023-10-31
+  - date: 2023-11-03
     version: 0.4.1
     changes:
       - type: improvement

Cargo.toml

@@ -2,7 +2,6 @@
 name = "pubnub"
 version = "0.4.1"
 edition = "2021"
-license = "PubNub Software Development Kit License"
 license-file = "LICENSE"
 authors = ["PubNub <[email protected]>"]
 description = "PubNub SDK for Rust"