readme: drop go 1.19 from support table (#2758)

Signed-off-by: Eliott Bouhana <[email protected]>

README.md

@@ -60,7 +60,6 @@ Datadog APM for Go is built upon dependencies defined in specific versions of th
 | 1.22 | [GA](#support-ga) |
 | 1.21 | [GA](#support-ga) |
 | 1.20 | [Maintenance](#support-maintenance) |
-| 1.19 | [Legacy](#support-legacy) |
 
 * Datadog's Trace Agent >= 5.21.1
 
@@ -105,4 +104,4 @@ If you're only interested in the tests for a specific integration it can be usef
 For example if you're running tests that need the `mysql` database container to be up:
 ```shell
 docker compose -f docker-compose.yaml -p dd-trace-go up -d mysql
-```
+```