Remove Trunk column of historical test matrix in README

Author: Mordil

README.md

@@ -133,15 +133,15 @@ For older versions of **RediStack**, view each summary below.
 <details>
 <summary><bold>RediStack 1.x</bold></summary>
 
-| Platform              | Swift 5.1          | 5.2                | 5.3                | Trunk              |
-|:----------------------|:------------------:|:------------------:|:------------------:|:------------------:|
-| macOS Latest (Intel)  |                    |                    | :white_check_mark: |                    |
-| Ubuntu 20.04 (Focal)  |                    | :white_check_mark: | :white_check_mark: | :white_check_mark: |
-| Ubuntu 18.04 (Bionic) | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: |
-| Ubuntu 16.04 (Xenial) | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: |
-| Amazon Linux 2        |                    | :white_check_mark: | :white_check_mark: | :white_check_mark: |
-| CentOS 7              |                    | :white_check_mark: | :white_check_mark: | :white_check_mark: |
-| CentOS 8              |                    | :white_check_mark: | :white_check_mark: | :white_check_mark: |
+| Platform              | Swift 5.1          | 5.2                | 5.3                |
+|:----------------------|:------------------:|:------------------:|:------------------:|
+| macOS Latest (Intel)  |                    |                    | :white_check_mark: |
+| Ubuntu 20.04 (Focal)  |                    | :white_check_mark: | :white_check_mark: |
+| Ubuntu 18.04 (Bionic) | :white_check_mark: | :white_check_mark: | :white_check_mark: |
+| Ubuntu 16.04 (Xenial) | :white_check_mark: | :white_check_mark: | :white_check_mark: |
+| Amazon Linux 2        |                    | :white_check_mark: | :white_check_mark: |
+| CentOS 7              |                    | :white_check_mark: | :white_check_mark: |
+| CentOS 8              |                    | :white_check_mark: | :white_check_mark: |
 
 </details>